Efren Valdez, 55, left his apartment in South Gate, California, on October 23, 2018, in a blue shirt and gray sweatpants and said he'd be back within two hours. He never came back.

He had been showing signs of dementia, and his family believes he got disoriented and couldn't find his way home. That changes how to think about this case. People with dementia who wander often go farther than anyone expects, sometimes by bus, and they don't always respond to their own name. Someone may have seen Efren and thought he was just a quiet older man who seemed a little lost.

He was described as shy. If you live or work around South Gate, Lynwood or Downey, have you seen anyone matching his description at a shelter, hospital or bus stop since 2018?