screen captured a gruesome crime across the news. >> coming to us from philadelphia where someone pulled the it trigger 13 times. >> allegedly tried to kale police officer. >> the entire thing was ought on crystal clear surveillance video. >> because a camera witnessed it all, the nation got a front row seat into a wired philly. you should know when you come to philadelphia you could be watched. there are over 4,000 cameras here that the city has access to. they are everywhere. so it seems that in the city of brotherly love big brother might be watching. it's part of a new mandate to modernize the police department and it starts here at the real-time crime center, where a vast network of camera thieves stream in action from all over town. sergeant green is one of the