A picture of a known prison escapee driving the mayor's car should drive the point home after the police pull the mayor over and investigate.
I want to live in the fantasy world you have described.
You won't be able to out-cynic me, but even I recognize that there are ways to break through injustice. The deeper you fall into cynicism, the more people you turn off from seeking justice.
The NYPD has their own terrorism and counterintelligence divisions. They are pretty much an FBI governed at a city level (minus all of the cool forensics science).
I wouldn't put it beyond NYPD (in theory) except IIRC the NYPD actually drives him around in their SUVs and he has an NYPD team that does his personal security.