Two snipers shot and killed four Dallas police officers and a DART officer Thursday night during a protest downtown.
Seven other officers and two civilians were wounded in a coordinated attack during the demonstration against recent shootings of black men by police in Louisiana and Minnesota.
A man who exchanged gunfire with police in the El Centro College garage was reported dead shortly before 3 a.m. Brown said the man told a police negotiator he was upset by recent police shootings.