When 30-year-old Natalie Harker didn't arrive home after her early morning cleaning shift, her family reported her missing. What followed revealed a killer who plotted his crime for weeks.

The body of a decapitated woman found in a seaside resort sparks panic. CCTV footage reveals the murder took place 200 miles away and the body was transported there in a suitcase..

The murder of Stephen Whitehead, who was found bludgeoned to death at work, leading police to suspect a burglary had gone wrong. But was the killer in fact a colleague harbouring a deadly grudge?