Adan Jacquez Hernandez was 21 when he was last seen on July 4, 1997, in south Stockton, California. He left his home that day for unknown reasons after about five days without speaking to family and never returned. His case remains unresolved and is being handled by the Stockton Police Department.

Adan is described as a Hispanic male, 5 feet 8 inches tall, about 150 pounds, with black hair, brown eyes, a slight mustache and beard, and a slightly drooping left eye. He was last seen wearing a blue and white checkered shirt, black pants, and sandals. He had a history of mental health issues, which may have contributed to his leaving, but no specific details about his departure have surfaced.

Anyone who knew Adan, saw him in south Stockton around July 4, 1997, or has information relevant to his whereabouts is asked to contact the Stockton Police Department.