Police have collared the suspected killer of a convenience store clerk who was gunned down two weeks ago in a botched robbery.

Quasheam Richburg, 20, of Ridge Drive near 27th Street in North Philadelphia, was the suspected shooter in the slaying of Mustafa Shaker, 50, at Trax Foods in North Philadelphia, on the edge of Northern Liberties. Police still are seeking suspect Marvell Hargrove, 17, of North Philadelphia. Authorities arrested Richburg about 8:30 a.m. this morning without incident in a home on Norwood Street near McKean in South Philadelphia.

Police say the pair entered the market under the El station on Girard Avenue near Front Street about 3 a.m. May 26 and demanded that clerk Shaker surrender the store's money. As Hargrove allegedly struggled to open the cash register, Shaker refused the robbery demand, and Richburg allegedly blasted his sawed-off shotgun at Shaker twice, hitting him once in the head and killing him instantly. The Egyptian immigrant is survived by a wife and two children.

Richburg had three prior adult arrests for offenses including illegal gun possession and false imprisonment. Charges were withdrawn in two cases when witnesses failed to appear; at the time of Shaker's slaying, Richburg had a bench warrant out for his arrest after he skipped a scheduled court appearance. Anyone with information about Hargrove's whereabouts is urged to call homicide detectives at (215) 686-3334 or 9-1-1.