I agree with GiveLove.
( I am only sharing the flip side of the same thing as I know how important it has been to you that all are cared for. Givelove's priority is for you though, and i like that best.)
On the idea of mercy, it is merciful on yourself and on him. Protects you and can protect him from more stupidity that harms you. No pity, but instead righteous indignation! Follow through gives you both a chance for the future. You can gain strength and freedom, he has a chance to learn as he suffers his consequences and therefore has a chance at stopping now. You are actually doing more towards saving his life as you protect your own. He owns how he choses to respond, in good or bad.
Glad to see all involved are moving to protect themselves and not getting lost in pity.
love tmmy