When injured police officers started arriving at Parkland Memorial Hospital in Dallas on the night of July 7, Dr. Brian Williams was there to treat them. As a trauma surgeon, he treats all patients the same. As a black man, he acknowledged his own complicated feelings about law enforcement during a press conference on Monday. "I also personally feel and understand that angst that comes when you cross the paths of an officer in uniform, and you're fearing for your safety," he said. "I've been there, and I understand that. But, for me, that does not condone disrespecting or killing police officers." Dr. Williams recently spoke with All Things Considered host Ari Shapiro.