Before he was finally captured by police in 1980, the Yorkshire Ripper terrorised the UK's Northern neighbourhoods with his vicious 11-year killing spree.
Now, over four decades later, his heinous crimes are still the topic of much true crime discussion, having been adapted into various internationally recognised documentaries, TV series and podcasts.
On Wednesday, Febriary 23, ITV is launching a brand new investigation that will see Peter Sutcliffe's murders reexamined by those who have since claimed that his methods have been used in other equally violent crimes.