Former Nassau County Executive Thomas Suozzi, far right, and Nassau Police Commissioner Lawrence Mulvey, second right, attend a demonstration in Roosevelt on a new gunshot location system called ShotSpotter. (Newsday Photo / Mario Gonzalez / July 23, 2009)

If shots ring out in Nassau, cop cars will be coming even sooner now.

County Exec Ed Mangano and police Commissioner Lawrence Mulvey announced that the ShotSpotter system, which zeroes in on sounds of gunshots and explosions and alerts police, has been added to First Precinct patrol cars.

Under the system, once a shot is registered, the location will appear in seconds on a map in the patrol car.

Mangano and Mulvey gave a live demonstration of the system Friday at the Uniondale Public Library.

ShotSpotter sensors have been in place since last July in Uniondale and Roosevelt.

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