I've studied the matter in depth, ive tried to talk sense into someone ready to jump off a 4 story building onto concrete or drive into water with handcuffs on

I've studied the matter in depth, ive tried to talk sense into someone ready to jump off a 4 story building onto concrete or drive into water with handcuffs on the wheel. I was unable to fix them. I left this guy to his own devices when nothing I did helped, I said your brain has some destructive feedback loops going on and you need to go and fix it. He's alive today. Im no expert but I sure have opinions!