In 1983, Diane Downs shot her three children, killing one of them. Diane’s children had been in the way of her relationship with a new man.
Diane shot her children and then drove them to the hospital - claiming a man had carjacked her. She had been shot in the arm. One of the children were dead upon arrival at the hospital. It did not take long for the police to figure out that her story was a lie. She is in prison, but has been eligible for parole twice, and was denied both times - most recently in 2010.
(A decade later, Susan Smith would use this same story when she killed her children. )