Washington Post Dallas police chief: Shooter seemed delusional, scrawled cryptic messages in blood Washington Post The gunman who fatally shot five Dallas law enforcement officers appeared delusional, taunted police during extensive negotiations by singing and “laughing at us” and wrote cryptic messages on a wall with his own blood before he was killed by a ... Dallas Gunman Had Plans for Wider Attack, Police Say New York Times Dallas police chief: Shooter scrawled 'RB' on wall in blood USA TODAY Are militant groups directing or inspiring attacks on police? NOLA.com Reuters - WUSA9.com - Los Angeles Times - CNN all 8,728 news articles »