The jury announced its verdict Tuesday morning, finding Lovette guilty of first-degree murder. He showed no emotion as the verdict was read.
Lovette was sentenced to life in prison without parole. He was not eligible for the death penalty because he was a minor when the crime was committed.
Prosecutors say Lovette and Demario Atwater abducted Carson, of Athens, Ga., from her home in March 2008 and forced her to withdraw $1,400 from automated teller machines.
Investigators say Carson was shot five times before her body was dumped on a Chapel Hill street.
Atwater pleaded guilty last year and was sentenced to life in prison.