0:00:00 > 0:00:00- Subtitles
0:00:00 > 0:00:02- Subtitles- - Subtitles
0:00:04 > 0:00:05- In a murder case...
0:00:05 > 0:00:08- ..it's a race against time - to discover what happened.
0:00:09 > 0:00:14- What, why and who's responsible?
0:00:16 > 0:00:21- I'm Mali Harries. I want to learn - more about a detective's work.
0:00:22 > 0:00:24- The scrutiny and analysis.
0:00:27 > 0:00:30- The interrogation and psychology.
0:00:34 > 0:00:39- Tonight, I gain an insight into - the work of the North Wales CSIs.
0:00:39 > 0:00:43- I discover - how they gathered evidence...
0:00:43 > 0:00:46- ..to catch the murderer - of a woman in Porthmadog.
0:00:46 > 0:00:50- Five years - after Ffion Wyn Roberts' murder...
0:00:50 > 0:00:54- ..her mother and father - talk about their loss.
0:00:54 > 0:00:57- I just hope - it doesn't happen to anyone else.
0:01:31 > 0:01:35- Porthmadog, a seaside town - attracting tourists every summer.
0:01:36 > 0:01:39- It's also home - to a close-knit community.
0:01:39 > 0:01:44- When one of the town's young women - was killed back in 2010...
0:01:44 > 0:01:47- ..the entire community was in shock.
0:01:57 > 0:01:59- It was a Friday night in April.
0:02:00 > 0:02:04- Tremadog's pubs were braced for - the weekend's revelry.
0:02:05 > 0:02:07- I picked Ffion up - from work at 8.15pm.
0:02:07 > 0:02:12- I was going out with my friends - and she asked if she could join us.
0:02:12 > 0:02:14- I said, "Yes, of course."
0:02:15 > 0:02:20- She said, "My friend's celebrating - her 21st birthday in Tremadog.
0:02:20 > 0:02:23- "We'll go there, Dad," - so that's where we went.
0:02:26 > 0:02:31- At the end of the night, we moved - from the Madoc Hotel to The Union.
0:02:31 > 0:02:33- That was the last time I saw Ffion.
0:02:37 > 0:02:42- After her parents had gone home, - Ffion stayed out with her friends.
0:02:43 > 0:02:45- At around four in the morning...
0:02:45 > 0:02:50- ..she left and walked home alone - along the main road to Porthmadog.
0:03:03 > 0:03:06- On Saturday morning, - there was no sign of Ffion.
0:03:07 > 0:03:10- The football club, where she worked, - phoned her house...
0:03:11 > 0:03:12- ..to ask where she was.
0:03:13 > 0:03:18- It was nearing one o'clock, and - Ffion was usually home by then...
0:03:18 > 0:03:20- ..after a night out.
0:03:20 > 0:03:24- I phoned Ffion 19 times - but there was no answer.
0:03:24 > 0:03:26- By about 1.30pm...
0:03:27 > 0:03:30- ..my son, Elgan, - came home and said...
0:03:30 > 0:03:33- .."Something's happened - near The Cut, Mam."
0:03:33 > 0:03:37- Police officers - were searching The Cut area...
0:03:37 > 0:03:40- ..behind the street - where they lived.
0:03:40 > 0:03:44- A couple alerted police - after finding a body in the water...
0:03:44 > 0:03:47- ..whilst walking their dog.
0:03:48 > 0:03:51- Idris approached - the police cordon...
0:03:51 > 0:03:57- ..and a CID officer asked Idris - what he was doing there.
0:03:57 > 0:03:59- He said, "My daughter's missing."
0:04:02 > 0:04:04- He came and asked me...
0:04:04 > 0:04:07- .."Does Ffion have a tattoo?"
0:04:07 > 0:04:10- I said, "Yes" - and described her tattoo.
0:04:10 > 0:04:14- I said it was black - and looked like that.
0:04:14 > 0:04:16- We suddenly clicked.
0:04:19 > 0:04:22- Ffion Wyn Roberts was 22 years old.
0:04:22 > 0:04:26- She worked locally as a carer - at Plasgwyn Nursing Home.
0:04:26 > 0:04:31- Initially, the family thought Ffion - had an accident on her way home.
0:04:32 > 0:04:36- But the truth emerged after - a detective visited them at home.
0:04:40 > 0:04:43- He said, - "I have something to tell you."
0:04:43 > 0:04:47- He just said, - "Your daughter was murdered."
0:04:47 > 0:04:49- Everybody started screaming.
0:04:50 > 0:04:52- That's how we were told.
0:04:58 > 0:05:03- Ffion's body was lying - less than 200 metres from her home.
0:05:13 > 0:05:16- She'd sustained injuries - to her head...
0:05:16 > 0:05:19- ..and was strangled - with her own scarf.
0:05:19 > 0:05:22- The pathologist claimed - she was dragged into a ditch...
0:05:22 > 0:05:24- ..before drowning in the water.
0:05:29 > 0:05:33- A specialist team - from North Wales Police was sent...
0:05:34 > 0:05:36- ..to carry out an investigation...
0:05:36 > 0:05:40- ..and gather - forensic evidence quickly.
0:05:40 > 0:05:43- I was the crime scene manager - on call.
0:05:46 > 0:05:49- Unfortunately, - it was a suspicious death.
0:05:49 > 0:05:52- A scarf - had been used as a ligature.
0:05:53 > 0:05:56- That was particularly significant...
0:05:56 > 0:06:01- ..in terms of trying - to maximise our opportunity...
0:06:01 > 0:06:06- ..to get DNA - or any other evidence from that...
0:06:06 > 0:06:10- ..because that was - definitely linked to the offender.
0:06:11 > 0:06:13- The CSIs erected a tent...
0:06:14 > 0:06:19- ..and removed Ffion from the water - to examine her body and her clothes.
0:06:20 > 0:06:23- The longer she stayed in water, - there's real potential...
0:06:24 > 0:06:27- ..of evidence getting lost.
0:06:35 > 0:06:38- The close-knit community - was in shock.
0:06:38 > 0:06:41- The town's residents - paid their respects.
0:06:45 > 0:06:50- She liked football and helped out - at Porthmadog football ground.
0:06:51 > 0:06:54- She was a keen Everton supporter.
0:06:57 > 0:07:01- She liked pop music. She watched - Top of the Pops every Thursday.
0:07:02 > 0:07:04- She screamed - if anyone interrupted it!
0:07:04 > 0:07:07- On the day of her funeral...
0:07:08 > 0:07:11- ..the town's businesses closed - in memory of her.
0:07:12 > 0:07:14- It's changed our lives completely.
0:07:17 > 0:07:19- No words can describe - the way we feel.
0:07:21 > 0:07:24- There's no way of explaining it.
0:07:25 > 0:07:27- A part of me is missing.
0:07:50 > 0:07:52- As they gathered evidence...
0:07:52 > 0:07:56- ..the police studied CCTV - that had captured Ffion...
0:07:56 > 0:07:58- ..before she disappeared.
0:07:58 > 0:08:01- There were 60 closed circuit cameras - in Porthmadog...
0:08:02 > 0:08:05- ..and 2,500 hours - of footage to analyse.
0:08:11 > 0:08:13- We know she left after 4.00am...
0:08:13 > 0:08:18- ..and walked down this road - towards Porthmadog.
0:08:18 > 0:08:23- As she walked home, we've heard from - an eyewitness, a lorry driver...
0:08:23 > 0:08:25- ..who saw her walking.
0:08:25 > 0:08:29- We also have a short clip - of CCTV footage from 4.30am.
0:08:29 > 0:08:31- That's the last clip of Ffion alive.
0:08:37 > 0:08:40- Ffion was walking up the street - towards the kebab house.
0:08:43 > 0:08:48- What I don't understand is - why she headed that way that night.
0:08:50 > 0:08:53- I left Tremadog - at two o'clock in the morning.
0:08:53 > 0:08:56- I walked the same steps as Ffion.
0:08:57 > 0:08:59- I'm here, she's not.
0:09:09 > 0:09:13- Police gathered items of evidence - from around the town.
0:09:13 > 0:09:17- But it was here, - at the floodgates near the Cob...
0:09:17 > 0:09:19- ..that they found key evidence.
0:09:25 > 0:09:28- Soon after discovering - Ffion's body...
0:09:28 > 0:09:32- ..the police started - combing the area for evidence.
0:09:32 > 0:09:37- It was here at the floodgates - that Ffion's handbag was found...
0:09:37 > 0:09:41- ..along with a pair of blue joggers - with a white stripe...
0:09:41 > 0:09:43- ..and black trainers.
0:09:44 > 0:09:48- The clothes were sent to - a forensics lab for further tests.
0:09:51 > 0:09:53- We started thinking...
0:09:53 > 0:09:57- ..that the perpetrator - knew the area by coming here.
0:09:57 > 0:10:00- It's not somewhere - you'd find easily.
0:10:01 > 0:10:03- This was key in our investigation.
0:10:06 > 0:10:08- The only thing we knew...
0:10:09 > 0:10:13- ..was that Ffion - knew the person who murdered her.
0:10:15 > 0:10:18- Ffion was a very good runner.
0:10:19 > 0:10:22- She would've run home.
0:10:23 > 0:10:28- That's why we believed she knew - the person who murdered her.
0:10:29 > 0:10:33- Police arrested Ffion's brother, - Elgan, and father, Idris...
0:10:33 > 0:10:35- ..as part of the investigation.
0:10:36 > 0:10:39- After detectives interviewed them...
0:10:39 > 0:10:44- ..and searched the family's home - and car, they were both released.
0:10:44 > 0:10:48- The mystery surrounding - Ffion's murder continued.
0:10:54 > 0:10:55- .
0:10:59 > 0:10:59- Subtitles
0:10:59 > 0:11:01- Subtitles- - Subtitles
0:11:11 > 0:11:15- Two months after Ffion Wyn Roberts' - body was discovered...
0:11:15 > 0:11:18- ..police continued to search - for her killer.
0:11:20 > 0:11:24- Detectives hoped that - the results of forensic tests...
0:11:24 > 0:11:26- ..would provide answers.
0:11:34 > 0:11:38- I went to meet - North Wales Police's CSI team.
0:11:38 > 0:11:43- Crime Scene Investigators gather - evidence from the crime scene.
0:11:48 > 0:11:52- When you arrive at a crime scene, - how do you prepare the area?
0:11:52 > 0:11:57- First of all we look to see where - they've established the cordons...
0:11:57 > 0:12:03- ..to make sure they're big enough to - keep people out of the crime scene.
0:12:03 > 0:12:06- Once we're happy that it's done...
0:12:06 > 0:12:09- ..we begin gathering evidence...
0:12:09 > 0:12:12- ..and in order to do that quickly...
0:12:12 > 0:12:16- ..if there's very important evidence - to be found...
0:12:16 > 0:12:18- ..we use stepping plates...
0:12:18 > 0:12:24- ..to make sure we don't damage it - by trampling on it.
0:12:37 > 0:12:42- As you can see, the CSIs have - already reached the crime scene.
0:12:42 > 0:12:45- They've discovered - an object on the floor...
0:12:46 > 0:12:49- ..and placed - a scene marker alongside it...
0:12:49 > 0:12:53- ..so that when we take photographs - and video, we know exactly...
0:12:54 > 0:12:57- ..where the object was found - at the crime scene.
0:12:59 > 0:13:02- There's a mobile phone - next to marker number two.
0:13:02 > 0:13:07- Something like that's important - when we arrive at the crime scene.
0:13:07 > 0:13:10- It either belongs to the victim...
0:13:10 > 0:13:13- ..or the offender.
0:13:13 > 0:13:18- It's important to find it quickly - so it can be processed.
0:13:18 > 0:13:20- They have a special laboratory...
0:13:21 > 0:13:24- ..to examine objects - and gather DNA evidence.
0:13:24 > 0:13:26- This is our DNA laboratory.
0:13:27 > 0:13:28- Exhibits are sent here...
0:13:29 > 0:13:32- ..and a technician - swabs them for DNA.
0:13:32 > 0:13:36- The swabs are then sent away - to a laboratory...
0:13:36 > 0:13:38- ..which processes them for us.
0:13:38 > 0:13:40- ..which processes them for us.- - What about the laboratory itself?
0:13:41 > 0:13:43- The room is completely sterile.
0:13:43 > 0:13:45- Every person who enters it...
0:13:45 > 0:13:50- ..must provide an elimination - sample DNA and wear special clothes.
0:13:52 > 0:13:57- We're able to swab exhibits - at the crime scene itself...
0:13:57 > 0:14:01- ..but with more serious cases, - we tend to send everything here...
0:14:02 > 0:14:05- ..because - it's a sterile environment.
0:14:09 > 0:14:13- In Ffion Wyn Roberts' case, the team - found important forensic results...
0:14:14 > 0:14:16- ..including - the DNA profile of a man...
0:14:16 > 0:14:19- ..from the scarf - used to strangle her.
0:14:21 > 0:14:24- The main area - that they concentrated on...
0:14:24 > 0:14:27- ..was the folds - within the knot itself.
0:14:27 > 0:14:32- So, in between those areas where - most force would've been applied.
0:14:32 > 0:14:37- It wasn't a full profile, - it was a partial profile.
0:14:37 > 0:14:40- But the scientists - found a full DNA profile...
0:14:40 > 0:14:43- ..on the trousers - found at the floodgates.
0:14:47 > 0:14:52- That profile matched the partial - profile from Ffion's scarf.
0:14:52 > 0:14:57- There were also clear results - from Ffion's handbag.
0:14:57 > 0:15:01- Initially, - we had swabbed the zip...
0:15:01 > 0:15:04- ..but we didn't get - fantastic results.
0:15:04 > 0:15:07- It only came back as Ffion's DNA.
0:15:07 > 0:15:11- But then we thought if someone - was going to empty that bag...
0:15:12 > 0:15:15- ..particularly a man, - how would they go about it?
0:15:16 > 0:15:19- We targeted - the underside of the bag...
0:15:19 > 0:15:22- ..as if it was - being held upside down...
0:15:22 > 0:15:25- ..while the contents - were being emptied.
0:15:25 > 0:15:29- We ended up with a full DNA profile - from our offender...
0:15:29 > 0:15:31- ..that matched all the other DNA.
0:15:35 > 0:15:39- But the DNA profile - wasn't on the National Database.
0:15:39 > 0:15:42- The killer's identity - remained a mystery.
0:15:42 > 0:15:46- As police carried out - door-to-door enquiries...
0:15:46 > 0:15:49- ..one local man's name - was mentioned.
0:15:49 > 0:15:51- Iestyn Davies.
0:15:52 > 0:15:54- What's that? A snooker cue?
0:15:56 > 0:15:59- Iestyn Davies was 53 years old.
0:15:59 > 0:16:01- He worked - at a wool factory in the town.
0:16:02 > 0:16:04- He rented a flat - in Porthmadog harbour.
0:16:05 > 0:16:09- The police interviewed him - and collected a DNA sample.
0:16:09 > 0:16:12- He'd also been caught - on CCTV footage...
0:16:12 > 0:16:15- ..the night Ffion disappeared.
0:16:15 > 0:16:20- The police started to study - the footage more closely.
0:16:23 > 0:16:26- We have a sighting at 4.15am - of Iestyn Davies...
0:16:26 > 0:16:30- ..walking down the high street - in the early hours...
0:16:30 > 0:16:33- ..towards - where Ffion was walking home.
0:16:34 > 0:16:38- These images show that Iestyn Davies - was walking towards the Cob...
0:16:38 > 0:16:43- ..wearing dark trousers - and black trainers at 5.09am.
0:16:44 > 0:16:47- Later, in the harbour, - footage from another CCTV camera...
0:16:48 > 0:16:51- ..captures light and movement - in his flat.
0:16:51 > 0:16:53- Later, at 6.11am...
0:16:53 > 0:16:57- ..this clip shows - that he's changed his clothes...
0:16:57 > 0:17:01- ..and is now wearing - different trousers and light shoes.
0:17:05 > 0:17:07- It was significant in this case.
0:17:08 > 0:17:10- We could trace his whereabouts...
0:17:10 > 0:17:12- ..and what he was wearing.
0:17:13 > 0:17:16- We know where he was walking - in the early hours.
0:17:21 > 0:17:25- In September, Davies was taken - into custody for questioning...
0:17:25 > 0:17:27- ..over Ffion's murder.
0:17:32 > 0:17:35- Iestyn Davies denied all knowledge.
0:17:35 > 0:17:38- He said he knew Ffion - and was a friend of the family.
0:17:38 > 0:17:42- He visited the family - to offer his condolences...
0:17:42 > 0:17:45- ..and attended Ffion's funeral.
0:17:45 > 0:17:49- He said he was walking his dog - that morning and nothing else.
0:17:53 > 0:17:58- After the police confirmed - that Iestyn Davies' DNA profile...
0:17:58 > 0:18:01- ..matched the profile - on Ffion's bag and the joggers...
0:18:02 > 0:18:04- ..he was charged with her murder.
0:18:08 > 0:18:13- We could prove 100% that - the trousers belonged to Davies...
0:18:13 > 0:18:16- ..and the handbag - belonged to Ffion.
0:18:17 > 0:18:21- It was here that Iestyn Davies - made his biggest mistake.
0:18:22 > 0:18:25- Instead of throwing them - into the water...
0:18:25 > 0:18:29- ..he decided to throw them over the - gate to get rid of the evidence...
0:18:30 > 0:18:33- ..and unfortunately for him, - but fortunately for us...
0:18:34 > 0:18:37- ..they landed - on the floor over there.
0:18:39 > 0:18:41- In March 2011...
0:18:41 > 0:18:44- ..he was tried - at Caernarfon Crown Court.
0:18:45 > 0:18:47- After an eight-week trial...
0:18:47 > 0:18:49- ..the jury deliberated...
0:18:50 > 0:18:53- ..but failed to reach a verdict.
0:18:54 > 0:18:57- After four days of deliberation...
0:18:57 > 0:19:00- ..the judge said - he'd accept a majority verdict.
0:19:04 > 0:19:07- At Caernarfon Crown Court...
0:19:07 > 0:19:12- ..a verdict was reached, with - 10 out of 12 jurors agreeing...
0:19:12 > 0:19:14- ..that Iestyn Davies killed Ffion.
0:19:15 > 0:19:18- The judge told him - he was a very dangerous man...
0:19:18 > 0:19:21- ..and sentenced him - to life in prison...
0:19:21 > 0:19:24- ..with at least - 25 years behind bars.
0:19:36 > 0:19:39- It was eight weeks of hell - for my wife and me.
0:19:40 > 0:19:43- I was glad a verdict was reached.
0:19:44 > 0:19:47- I was glad - I knew he was the murderer.
0:19:48 > 0:19:50- He was a friend.
0:19:51 > 0:19:55- To think he murdered - the daughter of one his friends.
0:19:58 > 0:20:00- I played five-a-side with him.
0:20:01 > 0:20:04- I'd go to football games with him...
0:20:04 > 0:20:06- ..and things like that.
0:20:06 > 0:20:10- Three days after he murdered Ffion, - he came to this house.
0:20:11 > 0:20:14- He said, "I haven't brought you - a sympathy card...
0:20:14 > 0:20:17- "..because I know - you've received a lot."
0:20:18 > 0:20:21- The night before he was arrested, - he said to me...
0:20:21 > 0:20:24- .."They're bound to get him."
0:20:24 > 0:20:28- He attended her funeral - and the wake afterwards.
0:20:38 > 0:20:42- These are only two boxes, - there are another three upstairs.
0:20:42 > 0:20:45- I counted them all two years ago.
0:20:45 > 0:20:49- We received 6,010 sympathy cards - from various people.
0:20:50 > 0:20:52- I'll read one of them for you.
0:20:53 > 0:20:57- "Thinking of you - and your family at this sad time."
0:20:57 > 0:20:59- Messages like that.
0:21:12 > 0:21:15- More than five years - after Ffion's death...
0:21:15 > 0:21:18- ..the effects can still be felt...
0:21:18 > 0:21:21- ..as the community - tries to deal with the murder.
0:21:22 > 0:21:24- Though Iestyn Davies - is behind bars...
0:21:25 > 0:21:28- ..people still ask - why a lovable 22-year-old girl...
0:21:28 > 0:21:30- ..was killed that morning.
0:21:35 > 0:21:38- Some locals still question...
0:21:38 > 0:21:41- ..whether or not - Iestyn Davies is guilty.
0:21:44 > 0:21:47- A lot of his friends - are supporting him.
0:21:47 > 0:21:49- Would they like to be in my shoes?
0:21:51 > 0:21:54- They have children of their own.
0:21:54 > 0:21:57- How would they feel - if their daughter was murdered?
0:21:59 > 0:22:01- That still hurts me.
0:22:03 > 0:22:05- Some of them live in this street.
0:22:06 > 0:22:08- They don't believe he's guilty.
0:22:11 > 0:22:14- The family says - that people still suspect them...
0:22:15 > 0:22:18- ..after Ffion's brother - and father were arrested...
0:22:18 > 0:22:20- ..early on in the investigation.
0:22:21 > 0:22:25- We're still tormented by it - to this day.
0:22:25 > 0:22:27- It's not fair.
0:22:27 > 0:22:30- My son has been through hell...
0:22:30 > 0:22:34- ..when they first thought - that he'd murdered his sister.
0:22:35 > 0:22:38- I know in my heart - that he'd never do such a thing.
0:22:54 > 0:22:57- She was a happy-go-lucky girl.
0:22:57 > 0:23:00- She'd do anything for anyone.
0:23:05 > 0:23:08- She was an angel and a half, - she really was.
0:23:11 > 0:23:13- I miss her.
0:23:15 > 0:23:18- Please let Ffion - rest in peace at last.
0:23:18 > 0:23:21- Just leave her in peace. Please.
0:23:50 > 0:23:52- S4C Subtitles by Adnod Cyf.
0:23:52 > 0:23:52- .