For more than 50 years, relatives of 27-year-old Cheryl Lanier knew only that she was last seen in San Francisco in the 1970s before vanishing without a trace.
This week, San Francisco police announced the case was officially closed: Lanier was identified as a Jane Doe in Houston who died in 1976. Authorities said the young woman had died after jumping from an 18-wheeler along a freeway. She had no identification on her when she died — only a bag of clothes and a road atlas.
Though she was reported missing in 2010, Lanier — about whom little is publicly known — was allegedly last seen in San Francisco in 1973, police said. San Francisco spokespersons could not confirm details about Lanier beyond her birthday and basic identifying information: a 5-foot-7, 130-pound Black woman with brown hair and brown eyes.
Police said their missing persons unit “worked tirelessly” on the investigation, which remained open until this year. In the summer of 2025, San Francisco police said they received a notification from Harris County, Texas, where Houston is located, that a deceased Jane Doe could potentially be Lanier.
Police did not offer any details on where the tip originated. Posts on social media suggest online sleuths had pressured law enforcement agencies as early as 2022 to investigate a possible match between Lanier and a 1976 Harris County Jane Doe based on similarities in their appearances.
San Francisco and Houston police officials would not confirm whether the tips came from internet users. Houston police spokesperson Jodi Silva said her department began speaking with SFPD in January about the possibility of a match.
The Jane Doe — now known to be Lanier — died on Sept. 30, 1976, Silva said.
On September 28, 1976, Houston police received a call from the driver of an 18-wheeler two days prior who said he encountered Lanier after pulling over along Interstate 10, also known as the Katy Freeway, to check on a possible flat tire.
The driver told police that a woman got out of a vehicle parked in front of him and approached him to ask for a ride. He said he told Lanier he was not allowed to have passengers and attempted to drive away, but she climbed into the truck anyway.
According to his statement to police, Lanier urged the driver to let her drive, saying she needed to operate it because it was going to “blow up.” When he refused to let her drive, she jumped out, he said. After police were called, Lanier was transported to a hospital in Houston, where she died of her injuries. The hospital has since been demolished.
Silva said the reporting party and two witnesses have since died, and investigators have been unable to find any records of the third witness.
San Francisco police confirmed Lanier was identified through DNA analysis through her relatives.
“SFPD offers its sincerest condolences to the family and friends of Lanier,” police said.