Christopher Harmon was convicted three weeks ago of driving while impaired and speeding in connection with a September traffic stop on Glenwood Avenue near Interstate 540.
A state trooper stopped Harmon after clocking his vehicle at 66 mph in a 45-mph zone, authorities said. A test showed Harmon has a blood-alcohol level of 0.11, above the 0.08 level at which drivers are considered intoxicated in North Carolina.
Harmon resigned on May 15. He has been with the Raleigh Police Department since June 1999.
His first court appearance is scheduled for Friday morning.