The North Carolina Highway Patrol refused to give a reason for Trooper Anthony Scott's dismissal citing privacy laws.
A spokesman confirmed N.C. Crime Control Secretary Reuben Young terminated Scott last month after hearing his appeal on a demotion and reassignment.
It was not clear if the termination was related to the August incident on Chapel Ridge Road.
Scott was put on administrative duty while the matter was investigated.
At the time, The Highway Patrol said Scott was on duty when it allegedly happened, but had not been dispatched to the location and was not there for official business.
The woman's husband, 41-year-old Eric Andrews, was charged with felonious assault by strangulation, felonious second degree kidnapping, assault by pointing a gun, assault on a female, and communicating threats.