A Missouri man ambushed and killed three law officers and wounded three others in Baton Rouge on July 17 during a time when police nationwide and in the Louisiana city in particular have been on high alert after five officers were killed in a Dallas ambush July 7. Louisiana State Police announced last week that they had received threats of plots against Baton Rouge police.
CNN: Three police officers shot dead, three more wounded in Louisiana

Police officers stand near the scene of where three police officers were killed this morning on July 17, 2016 in Baton Rouge, Louisiana. The suspect, identified as Gavin Long of Kansas City, is dead after killing three police officers and injuring three more.