The older brother of the man who allegedly shot and killed an undercover Houston police officer last week is wanted in a gang-related slaying last year of a South Carolina man, authorities said. Juan Pedroza Carrillo, 40, was one of three men linked to the November 2 fatal shooting of Jorge Alberto Vindel Ramos, 51, in Lexington County, S.C., authorities said. Ramos was shot in the head and chest with a .380 semi-automatic pistol as he was working on his car outside his home, officials said. While the motive for the killing remains under investigation, federal immigration officials confirmed that...