Alexandria police have charged a District of Columbia woman with murder and will seek a grand jury murder indictment against a male companion in connection with the Aug. 28 shooting of Old Town businesswoman Carol Ann Dodd, authorities said yesterday.

Gail Patricia Williams, 21, of 1513 Oates St. NE, is being held without bond in the Alexandria jail following her arrest Tuesday night, according to police information officer Sgt. Ron Graves. Williams is scheduled to appear in Alexandria General District Court on Friday to enter a plea.

Authorities refused to release the identity of the second suspect in the case. Alexandria chief prosecutor JOHN E. Kloch said only that the suspect was a man being held in another jurisdiction on an unrelated charge. "We will seek a murder indictment against him when the grand jury convenes on Oct. 6. The investigation is continuing, and robbery is still believed to be the apparent motive for the slaying," Kloch said.

Dodd, 35, was shot once in the back at about 2 p.m. on Aug. 28 as she worked at Brahm Opticians, 215 N. Washington St., one of two optical shops she owned in the city.

Police had conducted an extensive investigation into Dodd's death, according to police investigator Roy Nash, one of two officers who arrested Williams on Tuesday.