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.

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 last week, authorities said Monday.

The trooper, Thomas Mascia, 27, was suspended without pay this week, New York State Police Major Stephen Udice said at a press briefing on Wednesday. He said the agency was conducting both criminal and internal investigations into the circumstances of the shooting that Mascia reported as happening around 11:45 p.m. last Wednesday.

An all-out manhunt is underway after a New York State Police trooper was shot by a driver on the Southern State Parkway.

NY State Police are investigating Trooper Mascia, who was suspended after doubts arose over his claim of being shot on duty.

New York State Police and the Nassau County DA say they have launched an investigation into the credibility of a New York state trooper's report of being shot last week while on patrol. CBS News New York's Carolyn Gusoff reports.

New York State Police are looking into the credibility of Trooper Thomas Mascia's claim he was shot last week on Long Island.