Dallas, July 11: Days after shooter Micah X Johnson fatally shot five police officers here during a protest, officials have a reason to believe that Johnson was plotting a larger assault.
Dallas Police chief David Brown said: "We're convinced that this suspect had other plans." Johnson a veteran who served in Afghanistan, is said to have taken advantage of the protest to execute his plans.
Officials also believe that he took months to plan his sniper attack and practised his combat tactics in preparation.
Johnson had opened fire on police officials during the 'Black Lives Matter' march, where people were protesting the the fatal shooting of two Black men. One shooting took place in Minnesota while the other was in Arkansas.
Brown said that the police tried to negotiate with Johnson for close to two hours. "He basically lied to us, playing games, laughing at us, singing, asking how many did he get and that he wanted to kill some more," he added.
Officials found explosives, rifles and ammunition at Johnson's home and said that he was planning to use those against law enforcement targets. While officials tried to negotiate with him, Johnson told police officers that he wanted to kill more White people.
Johnson shot at 12 police officers, killing five of them and injuring many. He served as a reservist for six years until 2015 and was deployed in Afghanistan between November 2013 and July 2014, authorities said.