Patently Murder Armchair Detectives

There's been a murder. And we need you to solve it.

Welcome to the TV show with only one question -

whodunnit?

Welcome to Armchair Detectives.

The show where these 15 murder mystery enthusiasts will try and solve a

deadly crime by the end of today's programme.

Our amateur sleuths are placed at the centre of a fictional investigation

set in Mortcliff, a sleepy village with a serious homicide problem.

They'll watch the drama play out as Mortcliff's top police force

spring into action. There they are.

What a calendar that would be.

DI Knight, DC Slater, and their scene of crime officer, Simmonds.

We'll be heading to Mortcliff shortly.

But first, let's meet our armchair detectives.

-Hello, everyone.

-Hello!

Welcome back.

Only three of you play each day, take your armchairs, please -

Ellouise, Dipak and Audrey.

Come on up.

What a gentleman!

Ellouise, welcome.

-Hello.

-What is going to make you a good armchair detective?

I'm quite a curious person.

I always like to know what everyone is up to.

What everyone's doing.

Dipak, welcome, what about you,

what is going to make you a good armchair detective?

A few years back I did a, kind of,

management course where we were stuck out in the middle of Wales,

and we had a two-day event where we had to go and chase some clues.

Interrogate people, be interrogated.

There's none of that today.

Audrey, what's going to make you a good armchair detective?

I'm always a bit suspicious of people if they are a bit too nice,

I think...

I think I'd slip quite nicely into the role.

Well, the armchair detectives who correctly guess the killer will each get

their hands on one of these, our very own golden magnifying glass trophy.

-ALL:

-Ooh!

I'll be trying to solve the crime with you as we go along, too.

So, it's time for round one.

The crime scene. In today's story, Patently Murder,

Knight and Slater meet Simmonds,

who tells them all they need to know about today's victim.

Note pads at the ready for the first time today,

let's head over to Mortcliff.

I've always wanted to call myself one of those, sir.

You're too young for nostalgia, Slater.

The Hells Angels are old enough to be your grandfather.

You're always chipper early in the morning, Simmonds,

-how do you manage it?

-Plenty of coffee...

and no social life.

I can identify with one of those.

It's not the coffee.

Before I get done for bullying in the workplace, Simmonds,

you'd better show us the scene.

Yeah, save a DC's life, Simmonds.

Don't give up your day job for a future in stand-up, Slater.

I'm the funniest man I know.

Right.

Heather Cookham, the secretary at the factory, called for an ambulance

at nine o'clock last night when she discovered this van had its engine

running, with a pipe that ran from its exhaust, into this workshop.

David Cotley, the victim, was in the building.

He was alive when the medics arrived,

but died later at hospital from carbon monoxide poisoning.

Is it safe to go inside yet?

Yeah. It's been thoroughly aired.

We've done a prelim search and dust.

Shall we?

The place is a bit of a mess, but there are a few things of interest.

We found this letter on one of the desks, as well as some paperwork.

Also, this handkerchief with the letters PH on it.

We're about to bag this, and test its contents.

But as it was found near to where David was,

we're surmising he was sick in it.

From the carbon monoxide?

That's the current assumption.

This might be of interest.

It's full of shredded documents.

It was still warm when we arrived,

so it looks like it was used just before David died.

Any results on the van?

Obviously, we'll do a full dust.

But as it is a company vehicle, it's going to be overflowing with prints.

OK.

Let's find out who was here yesterday evening,

and interview anyone of interest.

-Already on it, sir.

-Quite the double act!

Well, Simmonds says she has no social life,

I don't believe that for a second!

So that is the initial crime scene.

Audrey, let me start with you.

The paper shredder being warm, obviously,

has the victim shredded some paper he wanted to hide?

Or did the killer shred something that he didn't want found?

How does somebody who is trapped, and not get out of it,

see that the gas was coming from the vehicle outside?

Potentially somebody who is in there, and can't get out,

yet they might have vomited, which is the victim's vomit,

-if I heard correctly?

-It's got to be planned,

because it's had to be done at a certain time, for no-one to be around.

To save them, stop them.

And I want to know who PH is.

Where did you see that?

-The initials?

-On the handkerchief.

The handkerchief, yeah.

Today, we are investigating the death of David Cotley,

David and his friends call themselves the Petrolheads,

a bunch of car engine enthusiasts.

So that's our victim.

Any early thoughts on him?

Well, he's an inventor,

could he have invented something that would be relevant, financially,

to somebody else?

Or to himself? Maybe that's why they've destroyed the paperwork.

Interesting. So, the suspect list so far is pretty narrow.

Heather Cookham, secretary at the Cotley Motor Factory.

Although we haven't met Heather yet.

She's the one who phoned the police.

She is the secretary, any initial thoughts.

I think the timing, for a secretary to work that late...

To say his time of death was 11 o'clock at night.

-So...

-Do you know, I paid my way through university by being a secretary,

Ellouise, and I was out that door at five o'clock!

Every single night, I'll tell you that for nothing.

In each round, you'll get to interrogate a piece of evidence more closely.

So here is your first one.

The forensic report detailing text messages found on David's phone.

One from Simon, Tuesday 11:30am.

And then to David Cotley again from Simon.

Wednesday 10.15.

Obviously, the PH on the hanky could have stood for "petrol heads".

So that could be a company thing, the hanky.

Ellouise is now desperately disappointed.

She was hoping for the old trope of dropping the piece of evidence

with the murderer's name!

That would be really easy, wouldn't it!

What did you say, though, Ellouise, about Simon?

It's his son. It could be, he says, "Hey, Pops."

Which is obviously...

It could be, but who is the "we"?

That's my question. Simon didn't make it,

but did the person he was coming with make it?

Some good thoughts there, but it's time for round two.

Last movements.

We'll get to see Petrolhead David Cotley, the day before his murder.

Notepads at the ready. Let's head back to David's workshop.

KNOCKING

David!

Oh, heavens above, don't do that!

Sorry, sorry! You were away with the fairies.

The inventive fairies.

Simon. How are you doing, old chum?

Sorry about the intrusion.

After last week's meeting, you said I could pop round and chat.

Right, yes.

Delighted to chat.

You're always welcome, Simon.

Pull up a pew.

-Thanks.

-Get rid of that stuff.

You...

Get to air the workshop much?

No need, old chap, I can't smell a thing.

Hangover from that bad virus I got a few years ago.

Well...?

How long did the engine coil take to develop?

About five years.

I came up with a good many different prototypes to try and solve the

issue. Not just me. Tony... your father, of course.

To be honest, Tony was the one that came up with the original idea.

Simon helped.

I was the one who worked out how to engineer it.

The original Petrolheads.

Indeed. Named not for our driving skills,

but for our collective obsession with machines.

How did it make you rich?

I patented the idea.

And since I had a monopoly on the market, it made me very wealthy.

As an inventor, it's important to understand the patent process.

Well, generally, a patent lasts for 20 years,

and you have to renew it every year within that time.

I've got one idea here that's very nearly ready to go.

You've always been an inspiration to me, old man.

More of a father figure to me than Dad.

Nonsense.

Dad has a business proposal that may interest you.

I've played a small part in the thinking.

Would you be able to meet him at ten, tomorrow, in the evening?

That sounds fine. You're a lot more interested in engineering than

-Graham.

-Well, unfortunately,

we don't always inherit our parents' talents.

I'm just lucky that I did.

Great to chat.

Tony! Hello!

Hello. Hello, Dave. Si!

-Am I interrupting?

-Not at all, I was just about to leave.

Thanks again, David.

-Tony, good to see you out and about.

-Always good to see you.

Thanks for seeing me, David.

Do you know, I fairly rattle around that great big house, you know.

I thought you were going to downsize.

June won't hear of it.

She loves the grand life, our June, eh?

Well, she helped with the patent, with the coil,

so I suppose it's only fair that she can share in its spoils.

Which is why I wanted to chat to you about the patent.

I was hoping you'd consider changing your mind.

Lots happened in that film, didn't it?

So, I worked out who "we" was.

-Yes, who's we?

-David said,

the original Petrolheads were Tony, Simon and David.

And I presumed Simon was that Simon's dad.

So then thought "we" was Simon and Simon.

Then he said Graham, and I don't know who Graham is.

It's almost like we've created a complex mystery for you to solve.

Something stuck out for me at the start of that film.

Did anyone else spot it?

He was taking pictures of his own patent.

-I did notice that.

-That was his redesign, so at some point...

-He's going to alter it.

-..I hope we get hold of that camera.

Let's take another look at the suspects board.

We still haven't met the mysterious Heather Cookham,

the secretary at the Cotley Motor Factory.

But there are four new suspects to add.

We've got Simon Delaney, entrepreneur.

Tony Harrow, Petrolhead member, and June Harrow, who is Tony's wife,

who we haven't met yet.

And Graham Cotley, who is David's son.

What? Simon's dad?

Because that says Simon Junior.

June and Tony have obviously got some axe to grind about the patent.

They were involved, or he said, how they were involved in the patent,

and they wanted him to have a change of mind.

Right. I've given you a piece of evidence already,

now's your chance to pick another one from the following list.

Decide as a group which one you fancy.

We have a blank envelope found at the crime scene...

or the patent agreement of the engine coil,

and finally the forensic report on the van parked outside the workshop.

I don't know why, but I'm drawn to blank envelope.

I'm drawn to the van, because the patented agreement,

all it's going to say is that it's for 20 years and renewable every year.

Dipak, what do you...? You've got the casting vote here.

Do you know what, I'm going to go blank envelope,

-because it's something completely new.

-Sorry.

-That's all right.

-We can look at the van in a bit.

Let me reveal what the blank envelope says.

The envelope is blank, and has a first-class stamp on it.

Underneath the stamp is a camera memory card

that has blueprint images saved on it.

There is a hand-written letter found inside the envelope that says

"Let me live, I want to break free. Save me."

You said he was taking photos.

So he could have taken the memory stick out of the card,

hidden it there when he realised he was being gassed and thought,

how am I going to do this, because the killer's maybe going to search

this van. Hide it under the stamp, and then shove that in.

So, armchair detectives, it's time now to lock in your prime suspect.

Who do you think is most likely to be the killer so far?

I need you to write down a name in your detective's notepad.

At home, join in as well, write down who you think it is.

Is it Heather, Simon Junior, Tony, June, or Graham.

Write it down now.

Time's up. Put your notepads away.

-Ellouise.

-Simon Junior.

Simon Junior? Why?

He's asking a lot of the right questions in terms of the murder.

Dipak, who is your prime suspect and why?

-I'm going with June.

-June?

-Yes.

-June? We don't even know what June looks like, Dipak!

I don't trust her silhouette!

-Audrey?

-Simon Junior.

Simon Junior. Why?

He was a bit too nosy.

What in the hell has it got to do with him about the patents,

and how long they run for, etc, etc.

He's got ulterior motives about the finance behind this patent.

OK. Interesting.

It's on to round three now, the police interviews.

Now, you get a lot of information here,

so pay attention to everything that's said.

It is time to see Knight and Slater zone in on the people close to the

victim, and pull them in for questioning.

Notepads at the ready.

It's off to Mortcliff police station.

Simmons, what do you have for us?

The victim shows no signs of trauma.

What about the van?

It had a petrol engine.

-Is that important?

-Well,

petrol engines emit more carbon monoxide than diesels.

David Cotley died quicker than he would have done in a diesel vehicle.

And the results on prints?

There were no usable prints on the keys,

all of the fingerprints found around the van were from David Cotley,

or company workers.

And the only prints on the pipe leading to the warehouse were from

-Heather Cookham.

-So nothing, then?

I'm trying my hardest.

Thank you, Simmonds.

You are a shining star in the otherwise cold, dark universe.

-Funny, Slater?

-Hilarious, sir.

Why did you visit David the day before his murder?

To ask him to reconsider keeping a patent active.

Money is tight at the moment.

I've just done major renovations. Without money from the patent,

I'm not quite sure what we're going to do.

-We?

-My wife, June and I.

What does your wife do for a living?

She takes care of all domestic arrangements.

June is a great wife and mother,

but that's when she's not out spending all my money.

Never give a woman a credit card, she just goes mad with it.

Do you have any idea who stands to inherit David's patents?

No, I don't. David, Simon, June and I all benefited.

What were you doing last night?

I was at home, and June was at Bridge club.

Why did you visit David the day before his murder?

I didn't.

Then why did he receive a text message saying you were visiting him?

That was my son, Simon Junior.

They've been close since Simon was a kid.

He asked David if he would be able to meet us at ten that evening.

If only we hadn't...

..maybe he'd still be alive.

Odd time for a business meeting?

I had a busy day.

Besides, we often caught up with one another in the evening.

And what did you want to meet David about?

I wanted to buy a patent off him.

What is it that you do?

I also construct engine parts.

So you and David are partners?

Well, no.

Rivals would be more accurate.

Don't get me wrong, David was a brilliant man,

he just wasn't the only one around.

I once patented a more modern idea than his at one point.

Do you have any idea who stands to inherit the financial proceeds of

-David's patents?

-David loved Graham,

I'd be surprised if he didn't pass on all his patents to his only son.

What were you up to last night?

I was at home. All evening.

-With your son?

-No, my son was at a friend's house.

-Which friend?

-I have no idea.

He's a grown man.

You'd have to ask him.

-Well...

-I noticed that he had a pocket hanky.

You're still thinking about that hanky, aren't you?

With PH on it.

He was an original PH member, so...

You're quite confrontational there, Ellouise.

I'm just trying to help you.

Audrey, what are you thinking?

Simon Senior, right, strange time to have a meeting, ten o'clock at night.

-It is.

-His son was supposed to go with him, but didn't go,

he went with friends.

So he hasn't got an alibi.

So if the son's not got an alibi, there's nobody to alibi the father.

Absolutely. We've learned a lot.

Let's take a look at the suspects.

We're still waiting to meet the mysterious Heather Cookham.

Who is she? And we've got a new one, Simon Delaney Senior.

Who's a Petrolhead member, which means, previously,

we met Simon Delaney Junior, the inventor.

Along with Tony Harrow, Petrolhead member, June Harrow, Tony's wife,

who we still haven't met, and Graham Cotley, David's son.

Who we've also not met.

Where is your finger of suspicion pointing now, Dipak?

-I'm sticking with June.

-Yeah?

Yeah.

-Audrey?

-I'm joint between both Simon Delaneys.

There's something a bit iffy about the pair of them.

-Ellouise?

-For some reason,

Tony saying June was at Bridge club at the time of the murder isn't

-sitting well.

-Once again, you can pick a piece of evidence,

and we've added a new one to the list.

We now have the patented agreement of the engine coil,

the forensics report on the van parked outside the workshop.

Or this new piece of evidence,

the forensics report on the pipe found at the workshop.

Maybe the patent agreement gives us something.

Yes, I think the patent agreement,

because that holds a lot of clues to what's gone on here.

If we're looking for a motive, I'd say the patent.

Yeah. I definitely think there's something more in that pipe as well,

because it's the only unique piece of evidence that's not contaminated,

like the van, with other people using it.

Shall we take the patent first?

And then the next time, we can go for the pipe.

Because technically, that's the murder weapon, if they pumped it in there.

Yeah, but then I think the motive for the murder is in the patent

agreement. We'll go for the pipe next, shall we?

Let's go motive, then.

I feel like Dipak has been slightly steam-rollered by Audrey there.

So this is David's patent agreement that was found in his workshop.

There's five years left on the agreement, with Tony and Simon both receiving

15% total profit of the coil.

Cotley, the victim, gets 70% of the profits.

I think Cotley owns 70% of it,

the other 30% he's gifted Simon Delaney Senior and Tony Harrow.

They don't actually own it.

-Otherwise they'd have...

-I don't have any doubt about the ownership.

He's written into the contract that these people will get a percentage share.

But there's only five years left on the contract.

So Tony would benefit from it being reapplied and extended,

and Simon would benefit from it not being extended,

because he would get to nick that engine part.

Armchair detectives,

I need you to write down who your prime suspect is now.

Join in at home.

Have you changed your mind?

OK, let's see who you picked.

Have you changed your mind or stuck with the same person?

Ellouise, last time your prime suspect was Simon Junior.

Have you changed your mind?

-I have.

-Who is it this time?

Graham.

Graham!

Why have you picked someone we've not met?

-That's the reason.

-Because you've not met?

-I don't know him.

-I love it, Ellouise.

-Dipak, last time you plumped for June.

-Yes.

Who we also hadn't met.

We have you gone for this time?

I've completely flipped now.

-Simon Senior.

-Simon Senior.

-Why?

-I'm just going on the evidence that we've got,

who was most going to benefit from this patent,

you know, changing hands, or defaulting.

Audrey, last time you went for...

-Simon Junior.

-Simon Junior.

-I'm sticking with Simon Junior.

-Oh, really?

-Yes. There's just something not right about him.

He's a bit too slippery.

Slippery! Well, now it's time for round four, where we dig a bit deeper.

It's one week before David Cotley's death,

and let's head back to Mortcliff.

Excellent. Nectar of the gods.

You really need a clear-out in here.

Nonsense, this workshop is self-cleaning.

Well, let me open a window for some fresh air.

Oh, wait, the window doesn't work!

Give the man a break, Heather!

I agree with her, this place is a tip.

I'm the only one that works here,

so you can leave it exactly the way it is, thank you very much, Heather.

Friends, we have worked together off and on, over the years,

and ever since the engine timing coil was patented 15 years ago,

we have done very nicely for ourselves.

DOOR SLAMS

Sorry we're late. Bus delays.

Very nice indeed.

New perfume?

I wear this every day.

If you had, I would surely have noticed.

I smell nothing. Which is just as well,

because you know that perfume is nothing more than ethanol.

Try not to spoil the moment, eh, Dad?

Anyway. I was just about to say that I have decided that now is the right

time for me to retire.

Already?

Indeed, you're a spring chicken.

Retirement's not all it's cut out to be, David.

I'm getting on in years

and I'm able to live comfortably.

What with my latest patent almost ready to be sent off

and the timing coil patent about to expire for the year, it just seems the right time.

And what will happen to the patent?

We're still making £200,000 a year on it.

But that's already dropped by half over the last decade.

Although there's still five years left, I'm going to let the patent drop.

-Wow!

-I know.

There were lots of looks there, weren't there.

Yes.

What do you think, Dipak?

Mr and Mrs Harrow, if he retires, or he dies, they lose out,

because the patent doesn't get renewed.

He owns the patent.

The secretary also, if he retires, she's got no job,

and she needs him to hang around, maybe.

So, let's take a look at the suspects board.

So, finally we can put faces to the names of Heather Cookham,

the secretary at the Cotley motor factory, and June Harrow, Tony's wife.

We've also of course got Simon Delaney Senior,

Simon Delaney Junior,

Tony Harrow and finally as well, Graham Cotley, who was the victim's son.

Anything changed for you?

No.

No. Ellouise?

Well, Ellouise, you'll be delighted to hear, once again,

it's time to pick your evidence.

There's another new item on the list.

You can either have the forensics report on the van parked outside the

workshop. The forensics report on the pipe found at the workshop,

and the new item of evidence is the last will and testament

of David Cotley.

The decision is yours, guys, what do you want to see?

Since Ellouise and I got our way the last time,

we'll let you have your way this time.

Oh, my God, I'm going to marry both of you, this sounds amazing.

So, in a beautiful example of consensus, Dipak, you now get your choice,

and you want to see the forensics on the pipe.

The forensic report reveals fingerprints were found on the middle of the

pipe, and silk fibres found at the ends of the pipe,

the fingerprints belonging to Heather Cookham.

-Ellouise?

-I'm really trying to remember who was wearing a scarf.

I don't know if it was Heather and June, or just June.

The secretary, to me, doesn't look like the silk scarf type of lady.

But June, with her lavish lifestyle...

June would have that, yes.

Guys, it's time to pick your prime suspect again.

Armchair detectives...

Write down who your prime suspect is now.

Have you changed your mind, or stuck with the same person?

Ellouise, last time you went for Graham Cotley,

despite never having seen him.

Who have you gone for this time?

-June.

-Why?

I feel like she's the only one that can afford a silk scarf.

Dipak, last time you went for

Simon Senior.

Have you stuck with that, or have you changed?

I've stuck with Simon Senior.

-Because?

-Because I haven't got any other evidence to push me either way.

I like the whole lavish lifestyle with the silk, the handkerchief,

I'm still waiting to put a few key pieces together.

Audrey, last time you went for Simon Junior.

-Yes.

-Have you changed your mind?

No, I haven't. He's obviously got wind at that meeting that they had

before that he had a new patent.

So I think he's maybe trying to get his grubby, greasy little paws on it.

Right. Well, we're motoring towards closing this case, it's round five.

The final clues.

The detectives go to meet Graham, David's son,

so let's have a look and see what happens.

Nice.

Hearing the call of the road, are you, Slater?

Something like that.

Thank you.

Just through here.

Is that your bike outside?

-Yeah.

-Cool.

More of a Stones man myself.

Can I see your driving licence, please?

Yeah.

Category A only?

Dad reckoned cars would be obsolete within 20 years, so...

-Take a seat.

-Thank you.

Sorry to have to ask this,

but do you know who benefits from your father's will?

I think I do.

The factory, and all of Dad's inventions go into a trust or something.

He probably wouldn't leave it to me,

I know he wanted me to take over the business,

but it's not really something I want to do.

Do you know what he was working on? We found a lot of shredded documents.

I wish I'd known, but he was very secretive.

Do you know Simon Delaney?

Dad's known both the Delaneys for years.

Simon Delaney would have loved to patent anything Dad developed.

Was there any bad blood between them?

Look, my dad was the sweetest man.

I really don't know why anyone would want to kill him.

Even though he could be infuriating and eccentric,

and make bizarre choices, sometimes.

What kind of bizarre choices?

Well, the decision to drop his main patent, for example.

That didn't make sense to you?

He'd have made much more money if he'd kept it active.

I didn't know David was around.

I assumed he'd gone home at five as he usually does.

You stayed late?

I was going on holiday,

and I wanted to sort out the salaries before I left.

Did you see anyone else, or hear anything?

No.

It was around nine, I realised I could hear an engine running.

That's when I saw the van parked outside the workshop.

It struck me as odd.

So I went to have a look.

That's when I saw the pipe.

I yanked the pipe from the workshop door, and the van,

and then reversed the van from outside the workshop.

When I opened the door, David was lying on the floor.

The ambulance turned up pretty quickly.

I can't believe he's dead.

How long had you known David?

25 years.

He was such a generous man.

Always. He was going to give me a pay rise

once the latest patent had been filed.

Where did you keep the keys to the van?

Above the sun visor.

David thought that was sensible?

We kept them there for years.

Because the van was widely used within the company.

Thank you, Miss Cookham. That will be all for now.

Well...

One thing that was a bit strange, in the note that he left,

-"Let me live, I want to break free. Save me".

-Yes?

The son had a poster up of Queen.

One of their famous songs is I Want to Break Free.

Oh, that got a round of applause, Audrey.

That got a round of applause.

So it's a bit strange that that should be in the thing.

And the son says that the inventions go into a trust,

but didn't say who the trust was for.

But in some sort of trust.

-Could it have been him?

-Let me see if I can help you,

-because you now get to pick your final piece of evidence.

-Right.

You've just got two pieces of evidence left to choose from.

But you'll only see one of them before you make your final accusation.

So you can have either the forensics report on the van parked outside the

workshop, or you can have the last will and testament of David Cotley.

Personally, I'll go for the will. What do you guys want to do?

Let's see what the will has to say.

-Will?

-Yeah, will.

OK. You've chosen to see the will of Mr David Cotley.

So, David's last will and testament explains that everything will be

passed onto his son, Graham, in the event of his death.

But he didn't want it.

He said very clearly, Dad knew that I didn't want it.

-Yeah, a lie.

-So would he then give himself it by killing his dad?

There's also the new patent as well that was going to be pending.

Patent number. That is the patent that he's getting.

Does anyone remember the old patent number.

Graham did say that his father wouldn't have left him that,

and it was going to a trust.

That was a porky pie.

Well, armchair detectives, this is the big moment.

You've seen most of the evidence, you've met all of the suspects.

You're about to make your final accusation for the chance of winning that

golden magnifying glass trophy.

So, I need you to write down who you are accusing now.

And you at home, who are you going to choose?

Have you been paying attention?

Who wears silk scarves, who owns the handkerchief?

These and many more questions will never be answered...

No! They will be answered in just a minute.

Time's up. Please put your pads and pencils down, armchair detectives.

Ellouise, who have you accused?

Simon Senior.

Simon Senior, and why?

Just going back to his interview,

I feel like he was very sketchy and he seems quite close to Heather to have

all the secret information, and his son went and done all the digging.

Dipak? Who have you accused?

I've gone with Graham.

-Cotley?

-That's correct.

-The son?

The victim's son? And why?

The very loose thread that I'm not convinced he wasn't aware of the will.

-Audrey?

-I changed my mind to young Graham,

because the fact that he said he wasn't going to inherit anything,

which he clearly was.

Before Knight and Slater tell us whodunnit,

there's one piece of evidence you haven't seen yet.

Would it have made a difference?

Would you have changed your minds?

Let's take a look. What you didn't look at was the forensic report on

the van.

It's a white van that was parked outside the workshop.

The vehicle has a dent in the left side, the front seat is forwards,

and the keys have been left in the ignition.

Fingerprint matches, David Cotley, Heather Cookham,

and workers from the factory.

Silk fibres were found throughout.

Would that have changed your mind at all?

No. The silk fibres throughout the interior,

could have come from anybody, at any time.

What really happened in today's story, Patently Murder?

Who killed David Cotley?

Let's find out. Whodunnit?

The pipe could only have been pulled out by Heather, not inserted,

as there were no fingerprints found near the exhaust.

With David dead, Heather loses out on her job.

Simon Delaney Junior and Senior both have other business interests.

According to the Inland Revenue, they are doing very well indeed.

Graham is the one who stands to gain most from his father's death.

Graham has a Category A driving licence, can he drive a van, so...

Whereas Tony and June Harrow on the other hand...

-I think we should bring them in.

-Mm.

For the record, present are DI Knight and DC Slater,

interviewing June Harrow.

Mrs Harrow, thank you for coming in today.

No problem.

Where were you on the night of David Cotley's murder?

I played bridge at my club.

-Did you drive there?

-Mm-hm, I always do.

You're very smart, aren't you?

It's a long time since I've been called that.

Well, you left university with a double first in engineering.

Your husband told us that the idea for David's electrical coil came from you.

Yes... Not something David remembered!

Must have been difficult.

So talented, but overlooked because of your gender.

I wasn't the only one.

And then to add insult to injury, David decided to let the patent lapse.

-It was outrageous.

-Being overlooked is one thing,

but losing money on something that was yours to begin with must

have been the final insult.

-I don't know what you mean.

-You and your husband were struggling

financially.

Tony tried to persuade David to keep the patent active,

to keep money coming in.

Tony knew that David was meeting Simons Junior and Senior so, therefore,

he would be in the workshop late.

So you drove to the workshop, you knew where the van keys were kept.

David didn't hear you, because he was listening to music.

Nor did he notice the fumes from the van.

See, you knew David had lost his sense of smell after a sinus infection.

Once the pipe was in place,

you parked the van in such a way as to block the workshop door,

you then got into your own car and drove to bridge club.

That's quite a story.

David started to feel unwell.

He noticed the pipe under the door.

He tried to get out, but he couldn't, because the van was in the way.

The window wouldn't open,

you knew that too.

By the time Heather called the ambulance, it was too late.

The poison was already in his system.

Something you failed to realise was that David had enough time to shred

the blueprint. We found an envelope with quotes from Queen songs, no name,

but both Graham and David were fans.

You have no proof.

You are the only one of the Petrolheads who can drive.

Sorry we're late, bus delays.

Also, you are, what, five-foot five?

We noticed the driver's seat in the van was pushed quite far forward.

Our forensic team have just finished tests on the seat adjuster.

It had silk fibres on it.

The same silk fibres that they found on the pipe.

And I'm willing to bet my life that they match your scarf.

You had motive, means and opportunity.

It was my idea. Mine.

He should have remembered where it came from

and he shouldn't have let the patent lapse.

He deserved to die.

June Harrow, I'm arresting you for the murder of David Cotley.

You picked up on all of the clues,

you just didn't put it together.

And at one point, June Harrow was identified by you,

and you changed your mind.

Does it all make sense now?

-Yeah.

-Yeah.

-Because when I said hindsight, I wanted to go back to her,

because I knew Category A licence, but it's all too late.

My life is over!

No, because the joy of Armchair Detectives is you get another chance.

-Learn from our mistakes.

-Don't worry.

Never mind, guys. You failed to pick today's killer.

Better luck next time.

Did any of you pick the killer?

Well, you get your chance as well.

That's all from Armchair Detectives, come back tomorrow,

where we find Knight and Slater on a cliff edge.

And remember, no-one gets away with murder in Mortcliff.

Goodbye.