Naier Briscoe, 19, is the third person to be charged in the fatal Aug. 23 shooting of Abdul Vicks, the West Philadelphia rapper and gang leader known as YBC Dul. Vicks, 25, was targeted in a drive-by shooting in Olney. Philadelphia police have previously charged 16-year-old Aiden Waters and 18-year-old Rashawn Williams. Vicks had been considered the leader of the Young Bag Chases gang in the Mantua neighborhood of West Philly.