Summary based on the NamUs case record (MP151185)
Mario Antonio Rivas is a Hispanic/Latino man who was 45 years old when he was last seen in Los Angeles, California, on August 28, 2016. At the time he went missing, he was described as 5 feet 7 inches tall and approximately 180 pounds, with black hair and brown eyes. His disappearance was recorded as occurring within Los Angeles County, and his last known location is listed simply as Los Angeles, California.
For his family, friends, and community, these basic facts are all that formally anchor his presence in the public record, even as the years without answers have stretched on.
Case notes in the national missing persons database indicate that Mario’s family has not heard from him for approximately 10 to 12 years, despite his last in-person sighting being dated to late August 2016. The record does not include information about what he was wearing, what personal belongings he had with him, or whether he was using a particular vehicle or mode of transportation when he was last seen. This absence of detail leaves a wide and painful space where the story of his last day should be, and it means that loved ones and investigators must live with a picture that feels incomplete, made up of a few hard facts and many more questions.
The NamUs entry for Mario notes that his case was created and entered into the federal missing persons system in 2025, nearly nine years after his last known contact. The listing places his disappearance in Los Angeles County and specifies that he was not missing from tribal land and did not have a primary residence on tribal land, underscoring that this is an urban, civilian missing adult case without special jurisdictional complications. The profile also confirms his basic physical description but reports no distinctive scars, marks, tattoos, or other unique physical features, which can make visual identification more challenging when there are no recent photographs or clear sightings to follow up.
Responsibility for investigating Mario’s disappearance formally rests with the Los Angeles Police Department’s Adult Missing Persons Unit, which is listed in the NamUs entry as the case owner, with a dedicated case number and contact information at the department’s downtown Los Angeles headquarters. The involvement of this specialized unit reflects that his situation is being treated as an open, active missing person case rather than as a closed matter or a case with a known outcome. Even so, the public documentation available today contains only a skeletal outline of what happened, emphasizing how difficult it can be for families when the official record offers little more than confirmation that someone is gone.
Mario’s case exists within a much broader landscape of missing adults in California. The state’s Department of Justice maintains a Missing and Unidentified Persons Section that assists local agencies by comparing physical characteristics, fingerprints, and dental and body X-rays to help identify individuals and resolve cases. Annual statistics compiled by this office show that thousands of missing person reports are entered each year, including many involving adults whose disappearances, like Mario’s, may not immediately attract wide public attention but still leave families in limbo. His listing in both national and state-linked systems helps ensure that his information remains accessible to law enforcement across jurisdictions, preserving the possibility that a future lead, match, or piece of information could bring clarity.
Behind the dates, measurements, and case numbers is the reality of a man whose absence is deeply felt. The note that his family has not heard from him in many years speaks to a long season of uncertainty and worry, one in which every passing year without news can weigh heavily on those who care about him. Mario Antonio Rivas is more than a profile in a database: he is a son, relative, or friend whose life once moved through the streets of Los Angeles and whose story remains unfinished. His case stands as a quiet reminder of the many families who continue to wait for answers, holding on to the hope that even after years of silence, the truth about what happened to their loved one might still be found.Last Seen: Aug 28, 2016
