In the early morning hours of March 13, 1982, John Plunkett, 40, was found dead in the driveway of a Portland, Oregon residence. A security guard on rounds discovered the body at about 3:30 a.m., and police treated the circumstances as suspicious from the start.

Investigators were unable to develop strong leads and public tips did not yield a breakthrough. There have been no arrests and no suspects publicly identified, and the case remains unsolved.

If anyone knew John Plunkett, saw activity in that neighborhood around March 13, 1982, or recalls information that might help, please come forward with what you know.