Emergency responder vehicles sit outside of the emergency room at Baylor University Medical CenterAP
Law enforcement sweeps the area for explosives after a shooting in downtown DallasAP
Reunion tower, right, stands with the lights out as the sun rises over downtown DallasAP
Areas of downtown Dallas remain closed FridayAP
A Dallas police officer, who did not wish to be identified, takes a moment as she guards an intersectionAP
Dallas police chief David Brownand Dallas mayor Mike Rawlings, rightAP
Dallas mayor Mike Rawlings, left, and Dallas police chief David Brown, right, leave a news conferenceAP
Dallas mayor Mike Rawlings, at podium left, and Dallas police chief David BrownAP
Dallas police chief David Brown pauses during a news conferenceAP
Dallas police chief David Brown passes a map showing the area of downtown that remains a crime scene during a news conferenceAP
Dallas police chief David Brown, front, and Dallas mayor Mike Rawlings, rear, talk with the mediaAP
A clerk looks at broke windows shot out at a store in downtown DallasAP
Law enforcement officials escort a couple in through the emergency room entrance at Baylor University Medical CenterAP
Law enforcement officials wait outside the emergency room entrance at Baylor University Medical CenterAP
President Barack Obama addresses the overnight shooting of police officers in DallasAP
A Dallas police officer, who did not want to be identified, takes a moment as she guards an intersection in the early morning after a shooting in downtown DallasAP
Law enforcement sweeps the area for explosives after a shooting in downtown DallasAP
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
Images from Dallas following a deadly officer shooting in downtownKTRK
A Dallas policeman keeps watch on a street in downtown Dallas on July 7, 2016AP
Dallas police stop a driver in downtown Dallas, July 7, 2016, following shootings of police officers.none
Dallas police move to detains a driver after several police officers were shot in downtown Dallasnone
Dallas police move to detain a driver after several police officers were shot in downtown DallasAP
Dallas police stand watch after police officers were shot in downtownAP
Dallas police order people away from the area after several police were shot in downtown DallasAP
Police and others gather at the emergency entrance to Baylor Medical Center in DallasAP
A Dallas police vehicle follows behind an ambulance carrying a patient to the emergency department at Baylor University Medical CenterAP
Emergency responders administer CPR to an unknown patient on a stretcherAP
Law enforcement officers stand outside the emergency room at Baylor University Medical CenterAP
An unidentified woman and a law enforcement officer hold hands as they walk out of the Baylor University Medical CenterAP
Two law enforcement officers console each other outside the emergency room of Baylor University Medical CenterAP
A Dallas police officer steps out of a vehicle as he arrives in front of Baylor University Medical CenterAP
A man raises his hands as he walks near a law enforcement officerAP
Police check a car on July 8, 2016, in DallasAP
The El Centro College parking garage stands in downtown Dallas early Friday, July 8, 2016AP
Police take cover behind a vehicle outside a parking garage in downtown DallasAP
Dallas police gather as a crowd forms in downtownAP
Dallas police officers stand in a line near the site of shootings in downtownAP
Dallas Mayor Mike Rawlings, right, talks with unknown persons as he arrives at the emergency room at Baylor University Medical CenterAP
Dallas Police Chief David Brown leaves the Baylor University Medical Center after a visitAP
A Dallas police officer covers his face as he stands with others outside the emergency room at Baylor University Medical CenterAP
A Dallas police vehicle that has a red fluid stain beneath the door is hauled away from the Baylor University Medical Center emergency roomAP
A Dallas police vehicle that has damage to the upper rear door and a red fluid stain beneath the same door is hauled away from the Baylor University Medical Center emergency roomAP
A Dallas police officer uses her smart device as she and other emergency responders stand outside the emergency room at Baylor University Medical CenterAP