Gregory Cardenas is the employee of Stan Harkavy, whose tax office was sieges in an armed shakedown. Gregory was beaten by one of the burglars, so Stan pulled out a shotgun and killed two of them, wounding only Angel Colon, who Gregory knew from fighting over a woman they both dated, Alicia Rodriguez.
It was revealed, although Angel wanted no part in the shakedown, the two men killed were hired by Max Purcell to scare Stan out of the shop for gentrification. As Stan was waiting for his property value to rise before selling to development, he knew what was happening and freely shot the burglars out of resentment. He made Gregory lie about the play out, so they’d be deemed justified in action. (L&O: “Shotgun”)