She killed a pregnant woman to steal her baby.
The case of Bobbie Jo Stinnett
Lisa Marie Montgomery was desperate to have a child, but she was physically unable to do so. Instead, she researched how to perform a cesarean section and went to the home of 23-year-old Bobbie Jo Stinnett who was eight months pregnant at the time. Montgomery brutally strangled Stinnett to death and then cut the baby out of her womb. She took the baby home and pretended that it was her own.