HAMMOND, Ind. (CBS) — A former Chicago Police Officer has admitted that he helped a street gang steal drugs, cash and weapons, prosecutors announced on Friday

Antonio C. Martinez, Jr., 40, pleaded guilty to all counts and will testify against others in the case.

Martinez admitted in court that he committed a series of robberies under the guise of legitimate police investigations, while wearing his Chicago Police Department badge and department-issued weapon, U.S. Attorney David Capp announced.

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Those crimes included several armed burglaries and theft of drugs in Rockford, Chicago and East Chicago, Ind.

The crimes also include the armed robbery of a woman at her Hammond home during which two guns were stolen; and the armed robbery at the home of James Walsh, late leader of the Latin Dragon gang in Hammond, the release said.

Martinez admitted he committed all of these robberies at the direction of the Latin Kings.

Martinez’s former partner, 41-year-old Alex Guerrero, is scheduled for a jury trial along with seven other defendants on March 19, 2012.

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