A gun stolen from a Fairfax County police officer’s locked car was allegedly used by a leader of a heroin distribution ring to kill another man in New Jersey, according to an indictment and police.

The Fairfax County officer, who was not named by authorities, was on leave in New Jersey in August 2012, when the gun was taken from his or her vehicle, said Lucy Caldwell, a Fairfax County police spokeswoman. The officer, who reported the theft, was allowed to be carrying the weapon in another state, Caldwell said.

Ronald T. Daniels, 24, of New Jersey, allegedly used the gun to fire into a group of people in Asbury Park, N.J., killing one man in September 2012. Daniels was arrested as part of a sweep that targeted a major heroin distribution gang. He is facing a first-degree murder, theft and firearms-related charges.

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