A D.C. Superior Court grand jury has indicted three Washington men in the slaying last March of 18-year-old gas station attendant William H. Bell, who was kidnapped and shot to death following a robbery.

Samuel L. Byrd, 26, of 2605 Bowen Road SE, Dickey A. Williams, 22, of 2005 Fourth St. NE, and Harold G. Austin, 26, of 1120 I St. SE were indicted for murder, armed robbery and armed kidnaping in connection with Bell's slaying.

Bell, according to police was working part time last March 3 at Johnson's Texaco at 13th Street and Good Hope Road SE when three men pulled up in a dark blue Mercedes.

While Bell was filling the car's tank with gas, the men demanded cash at gunpoint. Bell resisted and was shoved into the car, which then drove off. Bell, who lived at 1810 13th St. SE, was found later shot in the back a short distance from the station. He died after being taken to Capitol Hill Hospital.

Police arrested Byrd and Williams on March 11 and charged them in the slaying of Bell. Byrd subsequently escaped from the D.C. Jail twice, but was recaptured each time.

Austin, who was serving a jail term in Prince George's County on an unrelated charge, was later identified as a suspect in the killing and charged.