Marilu Alas Santos was 29 when she was last seen in McAllen, Texas, on September 5, 2012. She is described as 5 feet 5 inches tall, about 120 pounds, with brown hair. Her disappearance is registered with NamUs and the Texas Department of Public Safety, but there is limited public information about the circumstances of that day.

Her case remains unsolved and investigators continue to seek leads. Community awareness efforts and online bulletins have been used to try to generate tips that could help clarify what happened. If anyone remembers Marilu, saw her in the McAllen area around September 5, 2012, or has information that could assist the investigation, please come forward.