It happened last spring.

The police commissioner’s office and a New York City police captain tried to convince the public that a marauding band of kids had gotten out of control and terrified residents, motorists and pedestrians on a street in the Bushwick section of Brooklyn.

The cops were wrong. And they must have known that they were wrong, that the picture they were creating of youngsters climbing on top of cars and blocking vehicular and pedestrian traffic was completely false.

The Brooklyn district attorney, Charles Hynes, carried the canard further. That had to have been deliberate, too. He went on the Brian Lehrer radio program on WNYC and said that his office had investigated the matter  had conducted what he described as an “independent inquiry.”

“We had many, many interviews with local store owners and people who live in the neighborhood who are, frankly, scared to death of these kids,” he said. “And they were not just walking on one car; they were trampling on all sorts of cars. It was almost as if they were inviting their arrest.”