"Background story?", please elaborate first and foremost.
You KNOW, as well as I, what it allegedly is. Mentally ill girl, a few weeks out of psych hospital, in the middle of heated argument with parents about the removal of her children into foster care, and who according to an alleged call from her father, in the small hours of the morning, had gone mad and got hold of a gun. What does one do? Certainly NO ONE I know would waste 20 odd minutes flicking through a phone book to look for a police station which MIGHT be open, and call a friend for a chat before calling the police.
HowEVER much you defend him, Lookout, in the wee small hours, when there's no one but you to make excuses to about such strange behaviour, surely even you have to wonder.