A Pennsylvania man will spend the rest of his life in prison for killing his father, decapitating him, then posting it on YouTube. Justin Mohn was convicted by a Bucks County judge on Friday in a bench trial, and sentenced. He admitted shooting his father to death and beheading him last year in their home in the Philadelphia suburb of Levittown. Mohn called the horrific act a “failed citizen’s arrest for treason.” The prosecutors noted Mohn showed no signs of remorse.