Carlos Beltran Leyva was arrested in the Pacific coast state Sinaloa, where he and several of his brothers were born and allegedly started their gang. A judge ordered him held for at least 40 days while officials investigate possible charges of organized crime, the Attorney General’s Office said in a statement Sunday.His capture came just two weeks after his brother Arturo, known as “the boss of bosses” of the cartel, was killed in a shootout with marines at a luxury apartment in the city of Cuernavaca.Carlos Beltran’s arrest gave Calderon back-to-back victories in the drug war and underscored the government’s determination to destroy the cartel despite the threat of reprisal attacks. Days after Arturo Beltran was killed, gunmen massacred the mother and three other relatives of the only marine who died in the Dec. 16 shootout in Cuernavaca.Calderon vowed he would not be intimidated. However, authorities were far quieter in announcing Carlos Beltran’s capture, waiting three days to make...