Dallas gunman Micah Johnson plotted bigger assault and wrote message in his own blood, says police chief
The US military veteran who fatally shot five Dallas police officers last week was plotting a larger assault, possibly using explosives, and he taunted police and wrote on a wall in his own blood before being killed, authorities said on Sunday.
Instead, Micah X. Johnson improvised and used his military training to gun down officers during a demonstration on Thursday evening, Dallas Police Chief David Brown told CNN. It was the deadliest day for US law enforcement since the September 11, 2001, attacks.
“We’re convinced that this suspect had other plans,” said Brown, adding that the recent deaths of two black men at the hands of police in Minnesota and Louisiana led the Texas shooter to “fast-track” his plans and launch his attack.

He said a search of Johnson’s home turned up signs the gunman had practised using explosives, and that other evidence suggested he wanted to use them against law enforcement targets.
Before being killed by a bomb-equipped robot, Johnson sang, laughed at and taunted officers, according to Brown, telling them he wanted to “kill white people” in retribution for police killings of black people. “He seemed very much in control and very determined to hurt other officers,” the police chief said.