Keith Damion Overton, 18, who was shot to death Dec. 29 at the home of a grandmother, Mamie Cashwell, in Washington, was a lifelong resident of this area and had been in the Air Force since June.

Mrs. Cashwell also was shot to death in the incident.

D.C. Police said they issued a homicide warrant for the arrest of Clarence Cashwell, who lived at the residence on Pennsylvania Avenue SE where the shooting occurred. Clarence Cashwell was an uncle of Mr. Overton.

Cashwell was killed on Dec. 30 when he was struck by a truck on U.S. Rte. 29 at Culpeper, Va. Virginia State Police said he had jumped in front of the vehicle and that his death had been ruled a suicide.

Mr. Overton was born at Andrews Air Force Base to an Air Force family. He grew up in Suitland and was a 1980 graduate of Crossland Vocational High School in Camp Springs where he studied industrial electricity. He was an electrician-trainee with the Burgess Lighting Company in Camp Springs during the summer of 1979.

He also had worked as a kitchen helper at a nearby Ponderosa Steak House and a Red Barn restaurant in Capital Heights and on Saturdays had been a teaching assistant at Crossland High. In the Air Force, he planned to specialize in electronic engineering.

Mr. Overton was a resident of Forestville and was a member of St. Bernadine's Catholic Church in Suitland. He had won trophies for his bowling in the Parkland Lanes in Suitland.

Survivors include his mother and stepfather, Elsie and William Woodard of Washington; his father, Herman Overton of Florida; a sister, April McGruder of Gibbsboro, N.J., and a brother, Garrett Woodard of Forestville.