I wonder how Lori's daughter feels, knowing that her mom basically killed her ex-friend. But seriously, if you're an adult, and you decide to gang up on a thirteen-year-old just because you don't like the way she was acting? Not okay. (And seriously, who wasn't at least a little bitchy when they were thirteen? It's an awkward age.) Personally, I once had a friend who was extremely rude to me, but had she killed herself, I would have been devastated.
I suppose that realistically, it'll be an extremely difficult case to prosecute, but I think that just the fact that they're trying is a good thing.