Corvina gripped her elbows. “I don’t understand what happened with him. He wasn’t suicidal, at least not from what I knew of him. He was fine this morning, happy. It’s just … out of nowhere.”
That's just how it is a lot of the time. This was obviously some paranormally influenced act—but in real life people have chemical imbalances, they have deep depressions they can't handle, and hide their struggle to not be "a burden" to friends and family.