Your grand-daughter is what 8,10,12? She is old enough to learn the proper handling of firearms so your daughter would have one less thing to worry about. There is no need to tie one "event" to the other, grandma enjoys shooting, grand-daughter might to :)
As a added benefit, it might help to reduce the helplessness she is feeling witnessing what she has seen over the past several years, and not being able to do a dam* thing about it.
Every time I read about some youth shooting their best friend accidentally I gripe to my husband that every school grade should have a couple of classes on firearms really explaining how they work, not just "guns are scary". None of them have been taught that there could still be a bullet in the chamber, heck, even adults forget that!
I agree with LSAggie. I hope your daughter will get a gun, take classes to become proficient and also learn self defense techniques-same for your grand daughter. This loser sounds like he could be a danger to all of you.