Cops push to block probe into racial profiling during car stops

Three unions that represent New Jersey State Police have sued New Jersey Attorney General Matt Platkin in a bid to block his investigation into whether troopers deliberately slowed down traffic enforcement in response to claims of racial profiling in stops.

Union officials want a state judge to toss five subpoenas Platkin’s office issued in April demanding documents and ordering them to appear before a state grand jury probing the alleged slowdown. They also want the judge to bar the outside...