He was sentenced to 117 to 150 months for the armed robberies connected to the murders.
Last week a jury found Cooper guilty in a string of five killings in 2006 and 2007. Detectives say he shot the men to cover up a series of robberies throughout the Triangle.
Prosecutors are pushing for the death penalty. They rested their case last Friday and the jury has been deliberating since earlier this week.
The defense has presented reasons why Cooper should not be sentenced to die. They argue that years of physical and emotional abuse by Cooper's father left him with diminished mental capacity and unable to plan the killings.
Deliberations will resume Monday at 9:30 a.m.