Man sold drugs while he was informant, records say; Reputed career criminal got plea deal on gun charge after promising to help with gun, narcotics cases.(Main)

Byline: BRENDAN J. LYONS - Senior writer

ALBANY - The man indicted as the co-leader of a drug ring that allegedly included the wife of a former Schenectady police chief was dealing massive quantities of narcotics in the Capital Region while also working as an informant for the federal government, court records show.

Oscar Mora, 30, a reputed career criminal from the Bronx who resides in Watervliet, struck a plea deal on a federal gun charge last year that kept him on the streets in exchange for helping federal authorities "on gun and drug matters," according to a memorandum filed this week in U.S. District Court.

In taking the deal, Mora had cast himself as not being involved in the drug trade and promised not to break any laws or use drugs while free on bond. He also pledged to help the DEA and …