In a tense, middle-of-the night press conference early Tuesday morning, Missouri Highway Patrol Capt. Ron Johnson lectured members of the media about safety and implored them to assist law enforcement in calming tensions in the city. After reporting that two individuals had been shot and several police officers injured during another night of protests in response to last week’s shooting of Michael Brown, Johnson showed members of the media items that law enforcement officials had confiscated during the previous night’s protests including a Molotov cocktail, fireworks that had been thrown into a crowd, and two guns. Johnson said the guns...