David William Madott, 25, vanished on November 4, 1994 while on a scuba trip off Marco Island, Florida. He was one of four licensed divers who left the Marco River Marina aboard a 25-foot boat, the Sea Esta, bound for the wreck of the Baja California about 55 miles southwest of Marco Island. The outing included a mechanical delay to replace thermostats and a stop for bait.

After diving, the group surfaced around 3:30 p.m. to find the Sea Esta mostly submerged. All four men held the anchor rope until about 7:00 p.m., when the boat sank and they swam toward a U.S. Department of Defense light tower roughly three miles east of the wreck. Jeffrey Wandich reached the tower alone and was rescued about 36 hours later; Omar Shearer, Kent Munro, and Madott were never found. A six-day Coast Guard search covering 23,000 square miles recovered no bodies or gear. The official inquiry treated the losses as a tragic accident; other theories have been suggested but not substantiated.

Anyone who knew David, his plans that day, or has information about what happened is asked to come forward.