You with the police or summin'?

[ While he worried over his job, Noah was starting to headback to put up the sign - glad to see the proverbial light at the end. ]

I don't think you'd really have to worry about any murders or attacks that violent happening here. I mean, it's a closed off city, where the hell would the perpetrator run to? He could hide in the tunnels but, they aren't exactly the De- er, I mean they aren't like...never ending corridors and such.

[ He gestures to the entrance. ]

Guard and block off the entrances, put a simple team going in from each entrance, box the perp in. Simple.