Detectives have a murder arrest warrant for 19-year-old Xavier Dawu Murrell, who they said should be considered armed and dangerous.
Earlier this week, Eric Lamont Dillard, 19, is charged with robbery with a dangerous weapon and conspiracy to commit robbery with a dangerous weapon.
Wednesday, police said they charged Cresyan Tyrek Scurlock, 18, with murder, robbery with a dangerous weapon and conspiracy to commit robbery with a dangerous weapon in connection with the shooting.
Two people were killed in back-to-back shootings within three hours of each other Tuesday night.
ORIGINAL STORY: Raleigh police investigate 2 fatal shootings less than 3 hours apart
The first shooting happened around 10:40 p.m. in the 4900 block of Pebble Beach Drive, in the northeast part of the city. 21-year-old Taheem Ivory Lassiter died of his injuries.
Police said the shootings do not appear to be connected.