A tactic like this has Rahm Emmanuel written all over it.
I suspect that the NY media will come out mostly in defense of the fireman...as well as all firemen in New York state...and the cops themselves will likely support the guy.
A democratic strategy of going after the guy, has serious negative consequences. Toss in the fact that next years election in NY state is fairly important...and this attack on the fireman could really mess up what exists now.