Dennis Kan Yu disappeared from his Casa Grande, Arizona home in the early hours of November 24, 2012. He was 59 and last seen by family sometime between about 12:30 a.m. and 8:00 a.m. His wife remembered being woken around midnight because Dennis thought the front door was unlocked; a stepson who went outside for a smoke said he had forgotten to lock the door and that Dennis seemed a little nervous. By 8:00 a.m. Dennis was gone.

He left without his wallet, keys, glasses or the medication he needed after a prior stroke. He was last seen wearing a white t-shirt, blue pajama pants with white dots, and white socks. Investigators searched vacant homes and the city landfill and interviewed many people, but found no trace and no immediate sign of foul play. His family and coworkers describe him as a very nice person, and the lack of explanation has left them deeply troubled.

After five years with no contact, a Pinal County judge ordered a death certificate naming November 24, 2012 as the date of death, under unknown circumstances. The disappearance remains unresolved and the investigation has gone cold; his family continues to seek answers. Did anyone in Casa Grande see Dennis Yu or have information about that night?