Authorities have launched an internal investigation in the case of a New York State trooper who said he was shot by a suspect on Long Island’s Southern State Parkway at the end of October, authorities said Monday. Sources familiar with the investigation say they are looking into whether trooper Thomas Mascia shot himself in the leg, as opposed to what was reported. A state police spokesperson confirmed they are no longer looking for the black sedan Mascia had alleged the suspect was driving and that a search warrant was being conducted at his home. A large sum of cash and weapons was seized during that warrant execution, though no further details were immediately available. Chopper 4 showed a heavy law enforcement presence at Mascia’s home late Monday morning. One state trooper appeared to be stationed outside in the afternoon. The Nassau County district attorney’s office confirmed it was also investigating. New York State Police say that Mascia had been suspended without pay as the investigation continues — just three days after he left the hospital to great fanfare. Investigators had put out a $10,000 reward for information in Mascia’s shooting. Mascia was patrolling shortly before midnight Wednesday on the westbound highway near Exit 17 in West Hempstead — about a mile from his parents’ home — when he saw a black sedan parked illegally in the road’s median. State police had said Mascia was looking to help what may have been a stranded motorist, so the 27-year-old pulled up behind the vehicle, noted the license plate and got out of his cruiser. As he approached the back of the black sedan, investigators said, the trooper heard a series of shots and realized he had been wounded in the leg. Mascia retreated for cover behind his vehicle as the suspect drove off. He was later able to tend to his wounds, applying a tourniquet before being taken to a hospital. The incident was not captured on body camera. Mascia’s commanding officer said the five-year state police veteran was struck in the leg by one shot. He underwent surgery and was expected to make a full recovery. Authorities had been looking for the black sedan Mascia said was involved in the shooting, but the search was called off Monday.