Broken City (2013)

Continuity mistake: After leaving the movie theater upset, Billy jumps off the wagon going on a Meatloaf-sized booze-bender getting really drunk and obnoxious to anyone he encounters on the street. A little later he stumbles upon the crime scene and is suddenly stone cold sober.

Hurls34

Mayor Hostetler: You know, women call men dogs. That's to suggest we're somehow untrustworthy or disloyal. But a dog is anything but. And if men are dogs, what the goddamn hell does that make women? You've ever seen a bitch in heat? She will grind herself across the grass to try and get her that itch. And she can find a way to sneak out of the backyard, as any dog will do.

Question: How does Wahlberg realizes that the head of police is the man sleeping with the mayor's wife?

AnthonyA