The QAnon believer who allegedly decapitated his dad, showing off the federal employee’s severed head in an online video, had earlier waged an unhinged legal battle against the government over his student loans — claiming he should have been warned he still wouldn’t be able to get a job because he was an “overeducated white man.” Justin Mohn, 33, was taken into custody Tuesday night on suspicion of first-degree murder, abuse of a corpse and possessing an instrument of crime with intent in the killing of his 68-year-old father, Michael Mohn. The arrest came after he allegedly held up his...