‘So, what meds was he on? Or just off? (Dude sounds like he had a screw loose to me from the article.) No daddy in his right mind would do such a thing to his little girl.’
What if he’s a sociopath?
Adverse reactions to stopping some classes of antidepressants cold turkey have been documented, and many of the mass murder shooters were (at one time) on such drugs, or off their meds.