A man suspected of killing his wife and wounding two others at a county courthouse is dead, the mayor of Wilmington, Delaware said Monday. Mayor Dennis Williams said a man who fired a weapon in the New Castle County Courthouse was shot and killed by police who returned fire. He said the shooter shot and killed his estranged wife and wounded two other people. Delaware State Police told local media that the shooter fired shots after entering the courthouse and trying to breach the security line. Officers shot back and killed him.