The Tyneside Strangler Part 1...

In this episode Gayle tells us the tragic and horrible story of the Tyneside Strangler more commonly known as the Mary Bell story. In part 1 we go through the escalation of disturbing, aggressive and violent behavior that led up to the devastating murders of two innocent young children. If only steps would have been taken to correct this behavior and to recognize that eventually these behaviors would lead to extreme tragedy we might not be here telling this sad, sad story.

https://www.dailystar.co.uk/news/latest-news/twisted-girl-serial-killer-11-25708672
Book: Mary Flora Bell by Nancy Veysey and Ryan Decker
https://www.crimelibrary.org/notorious_murders/famous/bell/statement_3.html
https://academic-accelerator.com/encyclopedia/mary-bell