French serial killer who was nicknamed the "Criminal Backpacker" and has Klinefelter's syndrome. In 1997, he was convicted to life in prison for several murders with no chance of parole for 22 years.
He was abused by his father until the age of 17 and became an alcoholic as a teenager.
Due to his extra X chromosome, he lacked the physical ability to commit sexual assaults.
He had a good relationship with his younger sister and his mother, who died of cancer when he was 23 years old.
Glen Rogers is also a convicted killer.