The Bronx judge who sent an ex-NYPD sergeant to prison Thursday for fatally flinging a picnic cooler at a fleeing drug suspect claimed the punishment would serve as a “general deterrent” for other police officers. Judge Guy Mitchell justified the sentence of 3-to-9 years behind bars for former Sgt. Erik Duran, 38, by arguing, in part, that the decision would send a message — even as police and legal experts ripped it as “extreme and damaging” for law enforcement. The judge also rejected Duran’s testimony that throwing the cooler at scooter-riding Eric Duprey, 30, during the August 2023 undercover drug...