I'm sorry, this fucking shit is real stupid... don't believe a word that comes out of their mouth nor online.. it may be a virus due to ALL THE NUCLEAR PLANTS WE HAVE.. So live your life & shut the hell up with all the Zombies Apocalypse nonsense ...
So, he wasn't on drugs but they still apparently warrant a mention. How did that go? Was he thinking to himself "I should never have smoked that weed. I don't want to get into trouble for drugs so I'm going to admit to murder and cannibalism to throw them off the trail."
Mental illness isn't a possibility strong enough to mention.