Mary Bell, Worlds Youngest Serial Killer

So, how old would you say the youngest serial killer could be? 13, 14 or even 15? Guess again. Mary Bell a TEN year old girl has the record for worlds youngest serial killer.

Born May 26, 1957, Mary Bell is surprisingly still alive today, so watch out!

In the beginning years of her life, her mother (Betty) who was a prostitue and gave birth to Mary at age 17, tried to kill her daughter on multiple occastions. She made sure to make all occasions look like an accident. Mary Bell was also subjected to repeated sexual abuse by her mother, who forced her to perform sexual activities with old men at the age of 4! Can you imagine that? Not long after Mary stopped wearing diapers, she was involved in multiple sexual activities with old men. 
Because of her moms prostitution, it made her absent from the home very often. Usually when mom or dad comes home from a business trip, you wait for them by the door and jump into their arms. Not Mary- she hated when her mother was home and the only times she spent with her mother were the abusive brutal times of torture.

While not technically a serial killer by definition, Mary Bell is still regarded as one of the youngest serial killers in history. She began killing at the age of 10, a day right before her 11th birthday. Martin Brown was her first victim, whom she killed by use of strangulation. Her 13 year old friend somehow came to join her in her "fun" and they confessed together to killing Martin Brown. It was seen as a Norma prank to society, and the case was let go. Not too long after, they striked again. Brain Howe age 3 at the time, was their next victim, and again he was strangled to death. They then carved the letter 'N' in his chest, which they later changed to an 'M'.
There was non given reason for these choice letters but I believe it had to do with the first letter of their names.

M= MARY
N= NORMA

These young serial killers would eventually get caught in August 1968. The trial was set against Mary and Norma, charging them both with two counts of manslaughter. Norma was luckily excused of the charges but Mary Bell was convicted of both counts of manslaughter.
At the age of 23, Mary was let out of prison as a new person, and later settled down, had a daughter, and is now living hapily with grandchildren.
Is it possible years in prison could really change someone so violent?