Sebastian Ethan Martinez was 2 years old when he was last seen on April 4, 2011, in Sacramento, California. He disappeared after being taken, along with his siblings Nathan and Savannah, by their non-custodial parents, Walter Martinez and Daisy Arce. Authorities issued felony warrants for custodial interference for both parents in August 2011 and believe the family may have fled to Mexico.

Sebastian is described as having brown hair and brown eyes, with blue marks on his left ear and neck. Age-progression images have been created to aid identification as he grows older, but the family’s whereabouts remain unknown and the case is unsolved.

If anyone has information about Sebastian, his siblings, or the parents’ possible movements since 2011, please share what is known with investigators.