you look into family members and anyone else they may try to reach out to. >> sure. that contact network, that diagram of people they could reach out to. you can cast a net and it would be a lot easier over time to distill down to a couple of different location where is these guys might be, anything from a credit card transaction to a phone call could help. but there are things working in law enforcement's favor right now. nightfall is law enforcement's friend. they have the equipment. these guys had no time to plan this. this wasn't some sophisticated prison break where a bag of equipment was waiting for them at the end of a long tunnel. they have night vision, they have forward-looking infrared, they can get thermal imaging out there. there's a good opportunity for law enforcement to leverage that nightfall and the lack of light to benefit them. another thing is their lack of planning in this. there seems to be an impulsively violent act, unlike the prison