*insert long litany of swear words* As a mom who has had to take her now adult son to inpatient several times, I feel so much rage at the father. When your kid needs help, you go...right now. Given how few beds there are for adolescent mental health inpatient, if there is a bed available and waiting for your kid you RUN there--you've been given a blessing. And if your kid is actually asking to go to inpatient, you go right then no matter what. Kids generally don't ask to go to inpatient just for funsies--it's unpleasant as all heck, and teens know that from peers and media.
No gas or no money for gas--bet if he'd called the grandparents, they would have Venmo'd him the $$. Bet he could have found something in house to sell on Facebook Marketplace to get some quick cash. Clearly he somehow got gas sometime between that day and the shooting and still didn't take his kid.