four suspects are already in custody after sergeant brian terry was shot and killed tuesday evening. homeland secretary janet napolitano is expected to meet with them after arriving. pete williams is watching this story for us live in washington, d.c. >> secretary napolitano had planned to go to arizona anyway. so she moved her visit up a day, as she's a former governor of arizona, of course, to talk about what happened. this incident took place late tuesday in a remote area about ten miles north of the border. the man in charge of the union of border patrol agents says brian terry was killed in a shootout with bandits. these are people who rob and assault illegal immigrants and smugglers who come across the border, and the killing of a border patrol agent is raising new concerns about the security of the border. based on what we know so far, this does not seem to be directly related to the drug trade. but the union president for the border patrol says it shows that the border remains...