Barfield's body was found Saturday in her car in the parking lot of a credit union in Raleigh.
Lamont Carter is the twin brother of Larry Carter, who was arrested Tuesday and charged with murder in connection with the crime. Larry Carter remains in jail on that charge.
Lamont Carter -- who is about 5 feet 9 inches tall and weighs approximately 215 pounds -- is believed to be at large in the Triangle area. He may be driving a black 1997 BMW 740i bearing N.C. registration SRF 5885.
Anyone sighting the suspect or having information about his whereabouts should call 911 or the Raleigh Police Department's detective division at
or should call Crime Stoppers at
A reward is offered for information leading to Lamont Carter's arrest and conviction.