Have herd of groups going for walks with a video cameras tucked under their arm looking for houses w/open garage doors to see what's inside.
It's sad, I'm sure they wouldn't want somthing like that to happen to them, one of these days somthing like this will happen and all will be up in arms cause a member of the family will be hanging out in the house w/a weapon, and fix that problem !
So sorry for your friend, but am glad she wasn't hurt.