When Claudia, Jesus Martinez' pregnant girlfriend, shoots and hits car 2202, a bullet breaks the red light casing on the driver's side of the roof where Renko is crouched behind the car. In the closeup shot, the rotating light is now flashing white and the roof has bits of red plastic on it. However in the next wide shot, the light is flashing red and has not been broken.
When Captain Furillo opens the bottle of Scotch in his kitchen, you can see there are two sets of seals (Tax Paid Revenue Stamps) on the bottle. As he twists the cap off, one long, complete seal spins with the cap. After removing the cap (and the long seal), you see the normal broken seal which is still attached to the bottle from when the bottle was originally opened.