After entering the interrogation room, Luke and Selina simply stood in a corner and silently watched the others interact with Grote.
Mahoney was a capable young detective who, at the age of 26, had just been promoted to sergeant.
More importantly, he was one of the few detectives in the 15th Precinct who wasn't corrupt, and he had a hard time at the department.
Like Foggy and Matt, he was a local who had grown up in the Clinton area, and had a different kind of affection for the place.
It was also because of this that he could maintain his bottom line and not become a corrupt police officer.
With Foggy and Mahoney working together, Grote quickly lost his composure and revealed a lot of important information.
For example, before this, he hadn't mentioned that there had been a rumor going around the gang members that the assailant was acting alone.
Like what Luke said, the person had also attacked other gangs.
