When he was in the US Marines, David V. Cox testified in a court case that helped inspire the 1992 movie “A Few Good Men,” starring Tom Cruise, Demi Moore, and Jack Nicholson. Just over a year later, Cox disappeared, and a few months later his body was found along the banks of the Charles River.
More than 30 years later, his murder remains unsolved.
Cox had been out of the Marines for a little more than four years when he went missing on Jan. 5, 1994…