Marian Elizabeth Brown, a woman from Sussex County, Delaware, went missing on October 11, 1970, after cooking dinner for her two children at her home.

Her marriage was troubled, and she had previously separated from her husband but was living with him again at the time of her disappearance. There were reports that she left on her own accord to go to Puerto Rico.

The case remains unsolved, and investigators suspect foul play. They have a suspect, a man who died in 1988, who confessed to her murder, but never revealed the location of her remains. It is unclear if he was indeed responsible for her death.