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.

• Katherine Kelly