NEW HAVEN, Conn. (AP) — One of the three men charged in connection with the fatal shooting of a New Haven convenience store clerk has agreed to testify against his co-defendants in exchange for reduced charges.

The New Haven Register (http://bit.ly/2xZ4zzQ ) reports that Leighton Vanderberg pleaded guilty Tuesday to aiding and abetting first-degree robbery in the April 2015 shooting of 39-year-old Sanjay Patel, a clerk at Pay Rite Food Mart/Citgo Station. He had originally faced a felony murder charge.

The agreement calls for Vanderberg to testify against co-defendants. Prosecutors say Vanderberg drove the two alleged gunmen to the store and back to a housing complex.

Vanderberg already is serving a 40-year sentence for felony murder in the fatal shooting of Jose Salgado, killed while working at his small grocery store in Bridgeport.

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Information from: New Haven Register, http://www.nhregister.com