Carlos Alberto Diaz-Martinez, 35, of Fremont, California, was last seen December 30, 2023, after leaving his home on Laurel Street. He was reported missing when he failed to return and authorities say they are concerned for his safety because there is fear he may have been considering harming himself.

Diaz-Martinez is described as about 5 feet 5 inches, 140 pounds, with shoulder-length black hair, brown eyes and a goatee. At the time he was last seen he was wearing a black jacket, jeans, a gray hat and red Vans sneakers, and may have been carrying a blue backpack with tan leather accents. He did not have a cell phone with him, and it is unclear whether he took his skateboard. His last known intended destination was Aquatic Park Cove in San Francisco, but it is unknown if he arrived there.

Anyone with information about his whereabouts is asked to contact the Fremont Police Department. Does anyone in the Bay Area remember seeing him or his skateboard near Aquatic Park Cove on December 30, 2023?