Donna Scrivo - Michigan

Donna Scrivo, 59, drugged, strangled and then dismembered her 230 lb son, Ramsay Scrivo, 32 in January of 2014. He was severely mentally ill and doctors had determined he was psychotic and a danger to himself. She had been his legal guardian and caretaker since she'd petitioned the court the previous May. She said she felt his fathers illness and subsequent death was causing him to be despondent and suicidal. 

After killing him she somehow got him into the bathtub and dismembered him. She put the pieces of his body in plastic garbage bags and dispersed them along a rural roadside. A saw was also found in one of the bags. She reported him missing in January. 

She was arrested for the crime and plead not guilty, saying a masked intruder came in and forced her to help him murder her son. She was found guilty and sentenced to life without parole.