NUEVO LAREDO — After a respite of nearly two weeks in the violence that has plagued the Sister City, the head of the local emergency headquarters disappeared under ominous circumstances and a man was found dead in an apparently unrelated incident. C-4 chief José Luis Jácome Moreno, 60, was heading to work Tuesday morning when he was picked up by unknown men at the bus stop near his home in the Infonavit neighborhood, officials said. The panic button on his police radio was punched at about 6:20 a.m., alerting C-4 as well as other law enforcement agencies of an officer...