Webjennifer and james crumbley, the parents of michigan school shooter ethan crumbley, were sentenced to 10 to 15 years in prison. Webjames and jennifer crumbley, the parents of the teenager who killed four students in the 2021 school shooting in oxford, michigan, were each sentenced to 10 to 15 years in prison on tuesday,. The crumbleys were found guilty of involuntary manslaughter in.