Margo Andrea Register, 19, of Crystal River, Florida, was last seen on January 4, 1994. That day she and her husband, Willis Register, spent most of the time arguing. Willis says they stopped at a store on Highway 44 where he went inside to buy a beer and get change for a payphone; when he returned about five minutes later, Margo was gone and has not been seen or heard from since.

At the time she disappeared Margo was described as emotionally vulnerable, with a history of suicide attempts. She reportedly had no money, no extra clothes, and no job, factors that led investigators to question whether she left voluntarily. Authorities have long suspected foul play, in part because her relationship with Willis was turbulent; Willis later implied he had been trying to push her away and was convicted months after her disappearance of an unrelated murder, which left him a prime suspect in Margo’s case.

Detectives pursued numerous leads over the years but no conclusive evidence has emerged and Margo’s whereabouts remain unknown. If anyone has information about Margo’s movements in early January 1994 or about that stop on Highway 44, please come forward.