Diego Hernandez was one year old when he disappeared from Tempe, Arizona, on November 18, 2011. At that time he had shaved brown hair and brown eyes, stood about two feet, four inches tall and weighed around 23 pounds. Authorities classify this as a family abduction and believe Diego was taken by his non-custodial father.

The Tempe Police Department’s prevailing theory is that Diego and his father, named in reports as Arby Uriel Pat-Herrera or Arby Pat-Herrera, may have left the United States, possibly to Cancun in Quintana Roo, Mexico. The international angle has complicated the search and prompted long-term investigative efforts.

The National Center for Missing & Exploited Children has issued age-progressed photos in hopes of generating leads. If anyone recognizes Diego from these images or has information about his whereabouts in the months after November 18, 2011, or since then, please contact the Tempe Police Department.