[Fantasywriter]

‘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?

[Smokin' Joe]

If he acted with clear-headed malice and forethought, fry him. Go to the linked article, and read it, then scroll down to the link to an article where someone commented on him making some pretty off the wall statements and tried to get the police involved. It sounds like he went nuts.

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.