Philadelphia: In a shocking incident, a 32-year-man in suburban Philadelphia is accused of beheading his father and posting a gruesome video on YouTube showing his severed head and ranting against the US government, according to authorities on Wednesday. The suspect was identified as Justin Mohn, who was armed and jumped a fence at a National Guard facility when he was arrested on Tuesday.Philadelphia: In a shocking incident, a 32-year-man in suburban Philadelphia is accused of beheading his father and posting a gruesome video on YouTube showing his severed head and ranting against the US government, according to authorities on Wednesday. The suspect was identified as Justin Mohn, who was armed and jumped a fence at a National Guard facility when he was arrested on Tuesday.