In 2014 a local woman goes missing after a night drinking in the pubs of the town. CCTV finds her walking home, arm in arm with another local drinker. He just happens to be a former butcher. Police soon realise he has put his trade to use, by dismembering his poor victim and hiding her body parts around the town. It's a crime with no obvious motive, and one which shocked the whole community. He was a man with a past – he once set fire to his primary school, and was found by firemen sat in the middle of the blaze paying the piano. It's a dark story – that we're still unpicking. Pontypridd is labelled the murder capital of Wales for the volume of crimes there in recent years.

In 2000 a young woman is stabbed to death while walking her dog in a picturesque park in the town. She's a twin, a woman known in her local area. A suspect is seen running semi-naked across the M1 motorway and makes his escape. Cops initially suspect the killer of Rachel Nickel might be responsible...and it takes detectives weeks to identify the real killer is a local man called Leon Amos. They find out his family are known criminals, who have been covering Leon's tracks, and that the killer may have mistakenly carried out an act of retribution on the wrong twin.