In the beginning of the episode as Lt.Castillo is looking into the police cruiser at the dead cop, he blows out the candle on the dash. About a minute or so later after the two dirty hotheaded cops show up to vow revenge, the camera pans left to right from behind the cruiser to reveal the candle is lit.
In the cop bar fight scene, the punches are not even close. You can see space between the fist and the face several times.
Where the two cops pull over the men in the Porsche, behind them (to their South) is Las Olas Blvd, which is in Fort Lauderdale in Broward County. They were wearing Dade County police uniforms and would have been well out of their jurisdiction, even when they started to tail the suspects.