With the standoff still going on Tuesday night, two helicopters circled over the scene as officers in full tactical gear prepared in a neighboring field filled with dozens of law enforcement vehicles and mobile command centers. The warrant the officers were serving accuses a 29-year-old man of capital murder in the killing of a Mexican national found dead behind a vacant home in Edinburg last week. The date will allow time for Donald Newbury to file an appeal with the U.S.