Horst Walther Overdick-Mejía, alias El Tigre (English: The Tiger), is a former Guatemalan drug lord and associate of the Mexican criminal group known as Los Zetas. He is known for helping Los Zetas cement their power in northern Guatemala. He was considered by the authorities as "one of the most prolific" drug lords in the country of Guatemala. He was arrested on 3 April 2012 in San Lucas, Guatemala.