By Emilia Randall Federal authorities revealed that a man who allegedly murdered his father and showed his decapitated head on Youtube also attempted to mobilise the National Guard. Justin Mohn, 32 was eventually located at Fort Indiantown Gap, a military base roughly 100 miles away from where he allegedly decapitated his 68-year-old father, federal employee Michael Mohn. The father’s head was found wrapped in plastic in his home’s bathroom by his wife, Denice Mohn, who quickly alerted authorities. Mohn documented a disturbing rant against the American government in a video he posted to YouTub…