Investigators said Devin Scott Rigsbee, of Mebane, stabbed Hertford County Deputy Thomas Carrell Lewis during an argument alongside Interstate 40 in May 2004.
Lewis, of Windsor, died May 1 of multiple stab wounds to the back.
Rigsbee was charged with first-degree murder, but in a plea deal with prosecutors, pleaded guilty to second-degree murder. He was sentenced to a maximum of 16.5 years in prison.
Three other men -- Phillip Rigsbee, Joshua Abrams and Eric Isley -- were in the car with Rigsbee at the time of the argument, police said. They were charged with accessory after the fact. Prosecutors claim all three tried to destroy evidence.
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