Dallas Shooter Killed After Cops' Deadliest Day Since 9/11

A standoff in downtown Dallas that followed the fatal shooting of five police officers has ended with one suspect's death. CBS News reports that the suspect—who vowed to hurt more law enforcement officers, told negotiators "the end is coming," and claimed there were bombs planted "all over the place"—died from a self-inflicted gunshot wound after a standoff in a parking garage that included exchanges of fire with police. Police say a sweep turned up no bombs. Another three suspects—including a woman arrested at the garage—were in custody following what police describe as an attack involving multiple snipers during a protest against recent police shootings. In other developments:

• This was the deadliest attack on American law enforcement since 9/11, CNN reports. Some of the six injured officers are undergoing surgery.
• It was a "like a little war," one witness tells the Washington Post.
• Witness Ismael Dejesus recorded graphic video of the ambush of an officer, reports the Dallas Morning News. "It looked like an execution, honestly," Dejesus says. "He stood over him after he was already down and shot him three or four more times."
• President Obama, who is visiting Poland for a NATO summit, described the killings as a "tremendous tragedy" and said he had conveyed the "deepest condolences of the American people" to Dallas Mayor Mike Rawlings, the Guardian reports. Obama said that while all of the facts aren't in yet, it is clear that this was a "vicious, calculated, and despicable attack on law enforcement."

• Dallas Area Rapid Transit has identified its slain officer as 43-year-old Brent Thompson, the AP reports. "Our hearts are broken," DART said in a statement that described the officer as the first to be killed in the line of duty since the force was formed in 1989. The other four slain officers were Dallas police officers.
• A large area of downtown Dallas is now a crime scene, and authorities are asking people to stay away on Friday, CBS-DFW reports. "If you don't absolutely have to be in the western half of downtown today, Friday, please help us by staying out of the area," said Dallas County Judge Clay Jenkins.
• Mark Hughes, the man wrongly identified as a suspect in a Dallas Police Department tweet that included his photo, is out of custody and angry about how he was treated, the Independent reports. Hughes, who turned himself in for questioning after he was named as a suspect, told reporters that "the crazy thing about it is with hindsight, I could easily have been shot."
• Dallas Police Chief David Brown says it isn't clear whether there was any connection between the shooters and the demonstration, though the snipers appear to have known the route of the march, the New York Times reports. "We're leaving every motive on the table of how this happened and why this happened," he told reporters early Friday. "We have yet to determine whether or not there was some complicity with the planning of this, but we will be pursuing that."

(More Dallas police shooting stories.)