Carm wasn't really that big of a help if she wasn't allow to kill anything. Seriously. She was an executioner when it you took away all the nice things you could possibly say about her powers. She hadn't exactly closed her eyes, so she could definitely see what was going on. You didn't close your eyes in a situation like this, but she could feel the body tremble as the guy's friends shot him up...which meant she was probably going to get blood all over her outfit. That seemed to upset her more than the fact that there was now a dead body on top of her, or at least a body that was bleeding out. That was never good. What kind of idiots opened fire on campus where the police could hear you anyway?
"I think now would be a good time for you to get all the girls out of the room." She said loud enough for everyone to hear. She didn't have time to make sure it was only directed toward certain people. She wasn't all about yelling names, considering she was going to off every last one of them. The first thing she did was grab onto the leg of the guy who had been crouching beside her attempting to avoid gunfire, fingernails digging into his skin, breaking it. The green cloud emanated from her hand, allowing the poison to enter his blood stream. Once he started convulsing she let go. They could take one of the boys if they wanted, but oh she was going to fumigate.
If the girls hadn't run out already, they'd probably get hit by stray bullets if not so stray ones. The white-haired girl seemed to have a death wish, but she didn't much care. She could hold her own from what she could see. That was enough to pretty much have included her in the command to clear out. They had to find Claire Mills sure, but she was sure by the time they had gotten 'em down to one person, they wouldn't have the balls to try and keep it from anyone, especially if she was going to offer a quick and painless death as opposed to a slow and torturous one.
Probably not his ideal way of dealing with it, but these weren't normal sapiens. They deserved to be treated like they treated others, not that she was going to sell herself on some holier-than-thou bullshit.