Dale Strassburger's disappearance from Le Claire, Iowa in 1982 remains a mystery to this day. Strassburger was last seen on his way home from work in the early hours of August 6th. He lived with his parents in Davenport, Iowa and was expected to arrive home shortly after leaving work. However, he never made it home and was never heard from again.

Authorities found Strassburger's abandoned 1976 Oldsmobile in the eastbound lane on the Le Claire bridge over the Mississippi River on Interstate 80. It was found just twenty-nine minutes after he left work, but this location was not on his usual route home. Despite extensive searches of the river and the surrounding area, no sign of Strassburger was ever found.

Three years after his disappearance, a witness in a court proceeding in another state claimed to have information about a homicide connected to Strassburger's case. Authorities described the witness's account as "extremely credible" and stated that the witness knew information about Strassburger's disappearance that had never been publicly released. However, authorities were never able to verify the witness's account. In mid-2000, authorities announced that they were close to issuing indictments in the case, but none were forthcoming.

At the time of his disappearance, Strassburger was employed as a machinist at Rock Island Arsenal. Investigators believe that he was the victim of a homicide, but little information is available in his case. The circumstances surrounding his disappearance and the subsequent investigation continue to baffle law enforcement officials and leave his family and loved ones with unanswered questions.