Adam tells Mac that they have multiple surveillance feeds and are looking out for Hollis. Meanwhile, Adam tells Danny that they have live video feeds. Danny and Flack see a man who runs after they announce themselves. Mac tells Danny to take the killer down if he has to. The suspect climbs up to the street where Danny follows. Using police surveillance cameras, Mac directs the team to follow the suspect into an alley. When they catch up to him, they realize that the man they have been chasing it is not Hollis

The man says he ran since another man beat him up earlier while he was in the sewer. Hollis ordered the man to stay there before he gave him his jacket. Danny trades his jacket for the one that Hollis gave the man.

Back at the station, Mac orders Adam to run facial recognition software on the security cameras. Lindsay tells Mac she assembled drawings from Hollis's home and is going to try to decode it. Stella tells Mac that they recovered writings from the house that describes the Compass killer's previous victims. They realize that Hollis is a delusional schizophrenic and imagined the victims as being responsible for his wife's death. Mac figures that anyone could be the next victim.