A Washington state resident pleaded not guilty Thursday to a charge that he murdered a man as they walked side-by-side in Long Beach last month.

Gilbert Aaron Crawley, 48, of Spokane, is charged in the June 28 shooting of Archie Harris, 49, of Bellflower.

Police said Crawley and Harris “were known to one another and were walking side-by-side” in the 5800 block of Orange Avenue when Crawley allegedly shot him in the upper body. Harris died on the sidewalk.

Crawley was arrested during a traffic stop in the 6700 block of Atlantic Avenue a day later. There was no word on a motive for the shooting.

Harris was killed during a string of shootings in the area, including a deadly attack at a candlelight vigil in his honor.

The charge against Crawley includes allegations that he personally used a handgun in the commission of the crime and that he has a prior conviction for assault with a deadly weapon, according to the Los Angeles County DistrictAttorney’s Office.

He has remained behind bars since his arrest and is due back in a Long Beach courtroom Aug. 20.