Philadelphia police arrested Siddeeq Shakoor on Wednesday for the murder of 37-year-old Kenneth Kennedy-McLeod.
Investigators say Kennedy-McLeod was fatally shot during a robbery.
The shooting happened back in July inside a convenience store at Frankford Avenue and Pratt Street.
Shakoor's charges included murder and criminal conspiracy.
The other suspect, Kharee Simmons, was arrested shortly after the killing.