Patricia Girou was 45 when she and her husband disappeared from their Ballwin, Missouri, home on June 11, 1975. Their son arrived that day to take them out for Father’s Day and found the house locked and empty, with no sign of struggle and personal items — Patricia’s purse, wallet, money and car keys — left in the bedroom. Both cars remained in the garage.

The couple’s daughter told investigators the parents had dressed to attend a funeral (Patricia in a dress and hat; her husband in a suit) and left in a large green limousine, with the husband carrying a .38 caliber Smith and Wesson revolver tucked in his waistband. Searches of the neighborhood, the backyard and a property the Girous had purchased for a retirement home turned up nothing. Patricia had just signed a teaching contract for the coming school year.

There are stark contradictions between the orderly house and the family account of a planned outing in an unusual vehicle, and no clear explanation has emerged. If anyone knew the Girous, their movements that morning, or ever saw a large green limousine in Ballwin around June 11, 1975, please share what was seen or remembered.