Steven Andrew Campbell was 2 years old when he disappeared from El Paso, Texas, on July 31, 2011. He was last seen after a court-approved visit with his non-custodial mother, Karla Alicia Campbell. Steven’s father, William Campbell, dropped him at Karla’s residence and returned the next day to pick him up; both Karla and Steven were gone.

Authorities say Karla violated a custody provision that barred her from taking Steven out of the country and believe she took him to Juarez, Mexico. An international kidnapping warrant was issued for Karla in August 2012. She has multiple sclerosis, may use a walker, and is suspected of using aliases such as Alvarez. Neither Steven nor Karla has been located despite ongoing searches and public appeals through the FBI and the National Center for Missing & Exploited Children. Age-progressed images have been circulated to keep the case in the public eye.

If anyone has information about Steven’s whereabouts or remembers seeing Karla using an alias or needing medical assistance, please share what is known with investigators.