The Webster Police chief said the two killed firefighters, including a volunteer officer who was also a police lieutenant, did not expect to be "shot and killed" in the line of duty.
More top news
Newly-released documents reveal how British spymasters used an enticing female agent to test the mettle of rookie spies.
Researchers studying the King's remains believe he died after sustaining numerous blows to the head.
Edinburgh and its institutions have been at heart of the Union since it came about in 1707, here we look at the city's history.