Omar Mateen did not have illegal drugs or alcohol in his system, according to an autopsy report released by the medical examiner in Orange County, Fla.
Some LGBT activists worry that more police presence won't protect them from vigilante violence — and might actually make these events less safe for the communities they serve.
In the letter, the president mourns the deaths of officers in Dallas and Baton Rouge and thanks all law enforcement officers for their service. "We appreciate it, and we depend on you," he writes.
It's a difficult day for law enforcement officers after the killings of police in Dallas and Baton Rouge, La. For many officers, tensions are high and morale is low.
Three officers were killed and three others injured in a shooting in Baton Rouge, La., on Sunday. The three slain officers and the suspect have been identified. The motive, however, is still unclear.
With extra police and "rock boxes" playing music for delegates and visitors, Cleveland's leaders hope to be ready for anything during next week's Republican convention.
Critics say training firms use ambush-style videos that make police paranoid and quick to react with force. But not exposing officers to such scenarios puts them at unnecessary risk, trainers say.
Law enforcement officials briefed on the investigation have identified the gunman killed in Dallas as Micah Xavier Johnson. The Pentagon says Johnson was a military veteran who served in Afghanistan.
Officers can instantly freeze or seize the funds loaded on prepaid cards using the handheld device, and some civil liberties advocates say the machines may be abused.