Miller was last seen in San Francisco, California on May 15, 2010. He parked his silver 2004 Honda Pilot in the Golden Gate Bridge parking lot at 4:10 p.m., with his wallet, iPod and cellular phone inside it. Miller has never been heard from again. The surveillance cameras on the bridge didn't record anyone jumping from it that day, and no unidentified bodies turned up in the bay.

The circumstances of Miller's disappearance are unclear. He wasn't carrying any money, credit cards or identification at the time of his disappearance. There were possible sightings of him in the Fisherman's Wharf area in the days after he went missing, and his family believes he may be staying at a youth shelter or homeless shelter in the area. Miller was a student at DeAnza College in 2010. Santa Clara County, California police are investigating.