A former Montgomery County police officer has been charged in a warrant with robbing a Safeway supermarket manager in McLean Friday night and leading police on a wild chase.

Joseph Baltimore, who resigned from the force after being acquitted in 1977 of raping a 15-year-old girl, allegedly took a bagful of money from the manager in the Commons Shopping Center on Colshire Drive. The manager was walking to a bank in the shopping center when he was accosted.

The robber was then shot and wounded by a security guard, but managed to get into his station wagon and drive away. Police were unable to catch him.

Police yesterday were still searching for the robber. Two warrants were issued for Baltimore's arrest Saturday: one by Fairfax police, for the Friday night robbery and another by Montgomery County police, for allegedly robbing a Safeway supermarket manager in Rockville May 10.

Montgomery County police said the Friday night robbery in McLean "matched" the Rockville robbery. Police said the identified Baltimore as a suspect in the Rockville robbery through photo identification by witnesses.

While the McLean robber was fleeing, his car went out of control on Greentree Lane in Bethesda and crashed. As he was running away, a Fairfax County police officer fired a shot at him.

Police searchers later found a bloodstained shirt in a telephone booth on Democracy Boulevard. Police said they did not know whether it belonged to the suspect.

The police dragnet was called off about 6:30 a.m. Saturday.

Baltimore, 34, was a six-year police veteran when he was acquitted in July 1977 of raping the girl in the basement of a Bethesda elementary school. A police trial board later found that he had had sexual relations with the girl while on duty and he resigned from the force.