Mary Bell started her killings at the young age of 11, in 1968, for the manslaughter of two boys, Martin Brown (aged 4) and Brian Howe (aged 3). Mary was the product of a very abusive childhood which resulted in her mental instability. Mary Bell took on the alias of The Tyneside Strangler.
On May 25, 1968, the day before Mary Bell"s 11th birthday, Mary Bell strangled Martin Brown, who was at the time four years old. The second murder was committed with her friend Norma Joyce Bell (no relation) where Brian Howe, age 3, Brian Howe was strangled. Mary Bell and Norma Joyce Bell left the crime scene with Mary Bell returning some time later to carve an "M" into the victim"s stomach. If that was not enough, Mary Bell also cut off some of his hair, made scratches on his legs, and mutilated his genitals.
In 1968, both girls were charged with two counts of manslaughter. Bell was later released from prison in 1980, age 23, and has since lived under mandated court-protected anonymity for her and her daughters privacy. Mary Bell collaborated with author Gitta Sereny sometime later to account her life in the book titled Cries Unheard: The Story of Mary Bell.