Omar Trevino-Morales (C), known as "Z-42" and leader of the Zetas drug cartel, is escorted by soldiers during a news conference about his arrest in Mexico City March 4, 2015. Mexican security forces have captured Omar Trevino Morales, leader of the bloody Zetas drug cartel and one of the country's most wanted men, security officials said on Wednesday. Trevino, brother of captured ex-Zetas leader Miguel Angel Trevino Morales, was arrested in the city of Monterrey in the early hours of Wednesday, a senior government official said. REUTERS/Henry Romero (MEXICO - Tags: CIVIL UNREST CRIME LAW POLITICS DRUGS SOCIETY)