John Murice Jackson (born June 1, 1950) is an American actor, best known for playing Rear Admiral A. J. Chegwidden on the CBS series JAG[2] and also as a special guest star on its spinoff NCIS and recurring cast to its spinoff NCIS: Los Angeles.
In 1992, Jackson played Captain West, a senior JAG officer, in the American drama film A Few Good Men.
In 1996, Jackson took on the role of Rear Admiral A. J. Chegwidden (the Judge Advocate General of the Navy) in JAG, which he would continue to play for eight consecutive years.
Jackson had a recurring role as FBI Deputy Director Sam Cullen in the first season of Fox series Bones.
Jackson portrayed C-130 pilot Gus in the NBC series Knight Rider and has recently appeared on CSI: Crime Scene Investigation.