Due to a horrific childhood, Aileen Pittman Wuornos started prostituting at 14 years old!  When she was 33, a traumatic event threw her over the edge, resulting in the murders of seven men! 

References:

https://www.youtube.com/watch?v=AUy8EVqmZt4 

https://en.wikipedia.org/wiki/Aileen_Wuornos

https://www.crimemuseum.org/crime-library/serial-killers/aileen-wuornos/