Justin Mohn legally purchased a firearm one day before decapitating his father in Levittown, Pennsylvania, and then displaying the remains on YouTube. Mohn's father, Michael Mohn, was shot in the head before being dismembered by knife and machete. Mohn had a clear purpose and was of clear mind when he killed his father, and had no diagnosed history of mental illness. He faces charges of first-degree murder and abuse of a corpse.