A TV show which will explore the case of double Colchester murderer James Fairweather will air tonight.

The series called Britain’s Deadliest Kids is on every Saturday on Quest Red.

It sees Dr Keri Nixon, a consultant forensic psychologist, exploring criminal cases involving kids.

James Fairweather was handed two life sentences and will spend at least 27 years behind bars for brutally stabbing two people to death in Colchester when he was just 15.

He stabbed James Attfield 102 times near Colchester’s Castle Park in March 2014 and knifed Nahid Almanea 16 times on the town’s Salary Brook Trail two months later.

The trial heard he had researched killers including Ian Huntley and Myra Hindley and Yorkshire Ripper Peter Sutcliffe.

Fairweather, who has autism, admitted manslaughter on the grounds of diminished responsibility, claiming he believed he was possessed by the devil and heard voices that compelled him to kill.

A jury convicted him of two counts of murder after an expert told the trial that Fairweather’s description of the hallucinations sounded like something plucked from a horror film.

The episode features accounts from relatives, lawyers, former police officers, councillors and journalists who covered the case, including the Gazette's Ryan Jennings.

READ MORE: 'Prison is not the right place for double murderer... he'd be better off in hospital'

Britain’s Deadliest Kids airs Saturdays at 10pm on Quest Red and on the QuestOD app.

The channel is available at Channel 38 for Freeview, Channel 169 for Freesat, Channel 149 for Sky and Channel 215 for Virgin Media.