Coria was last seen standing in front of his home in the 200 block of north Smith Street in Santa Maria, California sometime after 10:00 p.m. on September 6, 2007. He has never been heard from again. He left his wallet and car keys behind in his bedroom, and he also left his car. No one saw him leave. Two days after Coria's disappearance, his family started receiving strange phone calls: the caller(s) would never say anything after Coria's relatives answered the phone. The calls stopped after three days. It is unknown whether they were related to Coria's disappearance.

At the time of his disappearance, Coria had a job with the city of Santa Maria and was also a student at Allan Hancock College. He is the oldest of four children. He has no criminal record or history of gang involvement, but authorities believe he may have gotten involved with drugs prior to his disappearance. Coria's loved ones stated he had no reason to leave and his disappearance is completely out of character. His case remains unsolved.