Denise Ruth Fagot, 22, and her 1-year-old son Daniel Spangle vanished from their Lancaster, California apartment on March 2, 1989. Denise’s boyfriend left for work that morning; a few hours later Denise’s sister found the front door open. The sliding glass door appeared forced, and a single muddy footprint was outside. Inside, a closet door in Daniel’s bedroom was off its track. Denise’s vehicle remained in its assigned parking spot and none of their belongings were reported missing.

Authorities shifted from an initial theory that Denise left voluntarily to investigating a possible abduction after those signs were found. Denise had recently moved to Lancaster to be closer to family after a breakup with Daniel’s father; he later failed a lie detector test about the disappearances but has not been charged. The case remains unsolved and is classified as an endangered missing persons case.

If anyone knew Denise or Daniel, or was in that Lancaster neighborhood on March 2, 1989, does anything about the footprint, forced sliding door, or people entering the apartment that morning come to mind?