>> listen, boom, boom, right in the car. >> muscle flash. >> right here. >> they cannot see his face but in the wider philly, the trail is not cold just yet. armed with this information, detectives can tap into their private cameras in the days to come to catch their dikiller. >> take a snapshot. >> without you, i am nothing. ♪ it is my final night embedding with the tactical force. once again, i am with officers pinto and ortiz. as we hit the streets, a job comes up on their computer.