New York State Police have launched a criminal probe into a trooper who claimed he was shot and wounded by an unknown gunman on a Long Island highway last week.

The investigation into Thomas Mascia's conduct is "far from over" as investigators continue to piece together what happened, an official said.

New York State Police say they are now conducting two investigations into Long Island State Trooper Thomas Mascia, who claimed he was shot in the leg while on the job last week.