Monster(2003)

“Based on a true story.”

In 1989, prostitute Aileen Wuornos befriends and enters a relationship with a young woman named Selby. Determined to straighten out her life, Aileen's limited education lands her back on the corner. She's raped by a trick, who she kills. A string of murder and robbery follows that ultimately leads Aileen to becoming America's first female serial killer.