Surveillance Cameras Work!

But it’s unlikely that Ray Kelly will tout this example:

The gutless driver busted yesterday for mowing down a bike-riding Brooklyn teen was done in by a high-tech video surveillance system set up by drug dealers to protect the building they once used as their den, sources said.

Melvin Morales, 34, was initially arrested about an hour after Sunday’s hit-and-run, by rookie cops who witnessed the tragedy.

The officers had chased the hit-run tow truck from the scene, but lost it briefly. When they saw Morales parked a few blocks away in a similar vehicle, they suspected it was the same truck and he was the driver.

While cops were trying to find proof, they were able to hold him on a DWI charge after his blood-alcohol level measured .096.

Cops found the evidence they needed at a building near the crash scene. Tape from an elaborate video system showed the rookies pursuing the same truck they later found parked.

Investigators then discovered paint transferred from tragic Anthony Delgado’s bicycle on the truck, sources said.

The equipment that helped nail Morales was installed by drug dealers later busted by the feds.