How does Paul Smecker know everyone's name in Boondock Saints?

I just rewatched the scene to see if he read their names off their uniforms, but they were all standing way too far away when he addressed them. The only other explanation that makes sense from what's shown is that Agent Smecker is driven to the crime scene in the back of a marked police car (he's shown arriving at the beginning of the scene, when he flashes his ID to the police chief from the back of the squad car). He could have met with the uniformed officers at the police station before being taken to the scene, and he almost certainly would have chatted up the two officers that he rode over with.