Juan Antonio Ramirez Villanueva was 24 when he was last seen in Glendale, California, on April 13, 2007. He had left his home in Stockton sometime between April 1 and April 18, 2006, and was not reported missing until April 2008. The last known contact came during a Glendale police interaction on April 13, 2007; there has been no confirmed trace of him since.

Villanueva is described as a Hispanic male, 5 feet 0 inches to 5 feet 3 inches tall, about 135 pounds, with black hair and brown eyes. Distinguishing features include a scar near his nose and a red-tinted nose. Stockton police are investigating and seeking information that could help locate him or explain his disappearance.

If anyone has information about where Juan Villanueva was between April 2006 and April 2008 or remembers seeing him in Glendale on April 13, 2007, please come forward.