Police say Brinsley had a long history of arrests and a strained relationship with family members
The killing occurred hours after two New York City police officers were fatally shot in Brooklyn.
Jaden Ramos called Saturday "the worst day of his life."
"This was an unspeakable act of barbarism," the attorney general said.
As news of the killings spread, sheriffs, police chiefs, officers and others offered prayers, black mourning bands and a reminder: #PoliceLivesMatter.
Bob McCulloch says he knew some of those coming forward were not telling the truth, but he chose not to filter them out.
The officers were sitting in their patrol car when the attack occurred, according to news reports
The punches were captured on a video that has racked up more than 600,000 views on YouTube.
The number of Americans who name race as the top issue has risen to a two-decade high.
The Wyoming ranch dog somehow shot his owner, Richard Fipps, from the back seat of a truck.