He evaded justice for 32 years but, today, Russell Bishop was found guilty of the notorious 'babes in the wood' murders in Wild Park in Brighton.
The jury took less than three hours to decide it was Bishop who strangled and assaulted 9 year olds, Nicola Fellows and Karen Hadaway, dumping their bodies in dense undergrowth, in 1986.
Russell Bishop, then aged 20, stood trial at the time - and cleared, but damning new forensic evidence finally proved his guilt.
Watch our Special Programme below, looking into the timeline of events that led to the verdict, how more advanced forensic science helped to match Bishop's DNA to key evidence, and looking into the mind of a killer.
Monday 10th December, 2018: