Salvador Alfonso Martinez, also known as "La Ardilla," or "Squirrel" in English, holds up his right finger while presented to the press under the custody of Navy marines at the Organized Crime Special Investigations Unit headquarters in Mexico City on Oct. 8, 2012. According to federal authorities, Martinez is one of the most wanted criminals in Mexico, and is allegedly a top regional leader of the Zetas drug cartel. (Associated Press)

Photo by: Marco Ugarte

Salvador Alfonso Martinez, also known as "La Ardilla," or "Squirrel" in English, holds up his right finger while presented to the press under the custody of Navy marines at the Organized Crime Special Investigations Unit headquarters in Mexico City on Oct. 8, 2012. According to federal authorities, Martinez is one of the most wanted criminals in Mexico, and is allegedly a top regional leader of the Zetas drug cartel. (Associated Press)