'Loner' Dallas gunman had bomb materials and kept journal of combat tactics

The brazen attack in downtown Dallas that killed five police officers and injured nine other people was the act of a lone gunman, an Afghanistan veteran drawn to Black Power symbology and a determination to kill white people, authorities concluded Friday.

“This was a mobile shooter that has written manifestos on how to shoot and move. He did that. He did his damage. But we did our damage to him, as well,” Dallas Mayor Mike Rawlings said after police carefully questioned and ruled out other potential suspects in the Thursday night rampage.

Investigators discovered bomb-making materials, rifles and a “personal journal of combat tactics” in the home of the black former Army reservist who struck during a demonstration against the shooting of two black men by police officers in Minnesota and Louisiana.

Authorities identified the gunman as Micah Xavier Johnson, 25, a Dallas-area resident, a “loner” with no criminal history who “wanted to kill white people” and “especially white officers,” police said.

“He appears to have been a lone gunman, and at this point, we cannot see any connections to any foreign or international terrorist organization, or any inspiration from them,” Homeland Security Secretary Jeh Johnson said.

The shootings marked the deadliest attack on law enforcement since the Sept. 11 terror attacks, and renewed the racial wounds that have opened up with increasing frequency across the country in the wake of a series of controversial police shootings.

“There has been a vicious, calculated and despicable attack on law enforcement,” said President Obama, who was preparing to cut short his trip to Poland for a NATO summit. “There is no possible justification for these kinds of attacks, or any violence against law enforcement. Justice will be done.”