Gustavo Barragan-Valencia was a 35-year-old Mexican national who was killed in Lincoln County, Oklahoma, on or about October 24, 2012. According to investigators, his death was brutal: he was shot execution-style, his hands and feet were bound, and a pillowcase was placed over his head. The Oklahoma State Bureau of Investigation is handling the inquiry and has said the slaying may be linked to an illegal marijuana operation. The case is currently described as a cold case. No arrests or specific suspects have been reported in the materials reviewed.

Does anyone with knowledge of activities around Lincoln County in October 2012, or information about illegal marijuana operations in the area at that time, have tips to share with investigators?