"That led to a need for power and underpinned his sadistic streak."

Dr Julian Boon is a chartered forensic psychologist and an honorary senior lecturer in Forensic Psychology at the University of Leicester. Dr Boon has been involved in a professional profiling capacity in assisting Police forces around the world for over 35 years and his technique in offender profiling served as the inspiration for the ITV drama Wire in the Blood, as well as being the focus of the C4 documentary The Real Cracker. He brings his expert knowledge and experience to each episode to provide an in-depth profile of our serial killers.

Get in touch on social media by searching for Crime+Investigation and using #MakingAMonster, and leave your thoughts in the review section of your podcast app.

Making a Monster: The Tapes features interviews recorded by Monster Films for the Crime+Investigation TV series, and was hosted by Cherry Healey, produced by Sam Pearson and Chloe Frost, with editing by Joel Porter.

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