Photos: Dallas police shootings

Flags fly at half-staff over Dallas Cityhall , Saturday, July 9, 2016, in Dallas. Five police officers are dead and several injured following a shooting in downtown Dallas Thursday night. (AP Photo/Eric Gay)

Buildings in downtown Dallas are lighted with blue to support the Dallas police, Saturday, July 9, 2016, in Dallas. Five police officers are dead and several injured following a shooting in downtown Dallas Thursday night.(AP Photo/Eric Gay) — Buildings in downtown Dallas are lighted with blue to support the Dallas police, Saturday, July 9, 2016, in Dallas. Five police officers are dead and several injured following a shooting in downtown Dallas Thursday night. (AP Photo/Eric Gay)

A worshiper wipes his eyes during a "United To Heal Prayer Vigil" at Cathedral Guadalupe, in honor of the Dallas police officers who were slain Thursday, in Dallas, Friday, July 8, 2016. A peaceful protest in Dallas over the recent videotaped shootings of black men by police turned violent Thursday night as gunman Micah Johnson shot at officers, killing five and injuring seven, as well as two civilians. (AP Photo/Gerald Herbert) — A worshiper wipes his eyes during a “United To Heal Prayer Vigil” at Cathedral Guadalupe, in honor of the Dallas police officers who were slain Thursday, in Dallas, Friday, July 8, 2016. A peaceful protest in Dallas over the recent videotaped shootings of black men by police turned violent Thursday night as gunman Micah Johnson shot at officers, killing five and injuring seven, as well as two civilians. (AP Photo/Gerald Herbert)

Misael Gonzalez, of Dallas, places a prayer onto a crucifix before entering a prayer vigil Friday, July 8, 2016, in Dallas at Cathedral Guadalupe, in memory of the Dallas police officers who were slain Thursday. (AP Photo/Gerald Herbert)

Texas Governor Greg Abbott, lower left, listens as Dallas Mayor Mike Rawlings, right, address the media during a news conference at city hall, Friday, July 8, 2016, in Dallas. (AP Photo/Tony Gutierrez)

A woman places flowers on a make-shift memorial at the Dallas police headquarters, Friday, July 8, 2016, in Dallas. Five police officers are dead and several injured following a shooting in downtown Dallas Thursday night. (AP Photo/Eric Gay)

A woman lays miniature American flags in front of a makeshift memorial out front of Dallas Police Department headquarters, Friday, July 8, 2016, in Dallas. (AP Photo/Tony Gutierrez)

A member of an FBI evidence response team marks the roadway at the scene where one or more gunmen opened fire on Dallas police officers last night in Dallas, Friday, July 8, 2016. A peaceful protest in Dallas over the recent videotaped shootings of black men by police turned violent Thursday night as an unknown number of people shot at officers, killing five and injuring seven, as well as two civilians. (AP Photo/Gerald Herbert)

AP Photo/Gerald Herbert

People take part in a prayer vigil at Thanksgiving Square, Friday, July 8, 2016, in Dallas. Five police officers are dead and several injured following a shooting during what began as a peaceful protest in the city the night before. (AP Photo/Eric Gay)

AP Photo/Eric Gay

People take part in a prayer vigil at Thanksgiving Square, Friday, July 8, 2016, in Dallas. Five police officers are dead and several injured following a shooting in downtown Dallas Thursday night. (AP Photo/Eric Gay)

AP Photo/Eric Gay

Chris Bailey walks by a makeshift memorial on Griffin Street holding a sign that reads, “Everybody Love Everybody”, Friday, July 8, 2016, in Dallas. (AP Photo/Tony Gutierrez)

AP Photo/Tony Gutierrez

Law enforcement personnel walk near evidence markers at the scene of the police shootings in Dallas, Friday, July 8, 2016. Five police officers are dead and several injured following a shooting during what began as a peaceful protest in the city the night before. (AP Photo/Gerald Herbert)

AP Photo/Gerald Herbert

Cynthia Ware places flowers on a make-shift memorial at the Dallas police headquarters, Friday, July 8, 2016, in Dallas. Five police officers are dead and several injured following a shooting in downtown Dallas Thursday night. (AP Photo/Eric Gay)

AP Photo/Eric Gay

Dallas police shooting — Dallas Police Chief David Brown pauses at a prayer vigil following the deaths of five police officers last night during a Black Live Matter march on July 8, 2016 in Dallas, Texas. Five police officers were killed and seven others were injured in a coordinated ambush at a anti-police brutality demonstration in Dallas. Investigators are saying the suspect is 25-year-old Micah Xavier Johnson of Mesquite, Texas. This is the deadliest incident for U.S. law enforcement since September 11. (Photo by Spencer Platt/Getty Images)

Noelle Hendrix places flowers near the scene of a shooting in downtown Dallas, Friday, July 8, 2016. Snipers opened fire on police officers in the heart of Dallas during protests over two recent fatal police shootings of black men. (AP Photo/LM Otero)

A crime scene investigator looks a shot out windows after a shooting in downtown Dallas, Friday, July 8, 2016. Snipers opened fire on police officers in the heart of Dallas during protests over two recent fatal police shootings of black men. (AP Photo/LM Otero)

Law enforcement sweep the area after a shooting in downtown Dallas, Friday, July 8, 2016. At least two snipers opened fire on police officers during protests in Dallas on Thursday night; some of the officers were killed, police said. (AP Photo/LM Otero)

Dallas police chief David Brown, left, and Dallas mayor Mike Rawlings, right, talk with the media during a news conference, Friday, July 8, 2016, in Dallas. Snipers opened fire on police officers in the heart of Dallas Thursday night, during protests over two recent fatal police shootings of black men. (AP Photo/Eric Gay)

Standing a block away from the shooting scene, Dallas Police Officer Camille Munoz reacts as she talks about her fellow officers killed by a sniper in downtown Dallas, Friday, July 8, 2016. According to Munoz, one of the deceased officers introduced her to her husband. (AP Photo/LM Otero)

A man looks at the engraved names of fallen law enforcement officers at The National Law Enforcement Officers Memorial in Washington, Friday, July 8, 2016. Five law enforcement officers were killed in Dallas on Thursday. (AP Photo/Alex Brandon)

Dallas police respond after shots were fired during a protest over recent fatal shootings by police in Louisiana and Minnesota, Thursday, July 7, 2016, in Dallas. Snipers opened fire on police officers during protests; several officers were killed, police said. (Maria R. Olivas/The Dallas Morning 海角社区app via AP)

Maria R. Olivas/The Dallas Morning 海角社区app via AP

Dallas Police shield bystanders during a Black Live Matter rally in downtown Dallas on Thursday, July 7, 2016. Multiple media outlets report that shots were fired Thursday night during a Dallas protest over two recent fatal police shootings of black men. (Smiley N. Pool/The Dallas Morning 海角社区app via AP)

Smiley N. Pool/The Dallas Morning 海角社区app via AP

Dallas Police respond after shots were fired at a Black Lives Matter rally in downtown Dallas on Thursday, July 7, 2016. Dallas protestors rallied in the aftermath of the killing of Alton Sterling by police officers in Baton Rouge, La. and Philando Castile, who was killed by police less than 48 hours later in Minnesota. (Smiley N. Pool/The Dallas Morning 海角社区app)

Smiley N. Pool/The Dallas Morning 海角社区app

Dallas police stop a driver in downtown Dallas, Thursday, July 7, 2016, following shootings of police officers. Snipers apparently shot police officers during protests and some of the officers are dead, the city’s police chief said in a statement. (AP Photo/LM Otero)

AP Photo/LM Otero

Dallas police detain a driver after several police officers were shot in downtown Dallas, Thursday, July 7, 2016. Snipers apparently shot police officers during protests and some of the officers are dead, the city’s police chief said in a statement. (AP Photo/LM Otero)

AP Photo/LM Otero

Dallas police order people away from the area after several police were shot in downtown Dallas, Thursday, July 7, 2016. (AP Photo/LM Otero)

AP Photo/LM Otero

Dallas police move to detain a driver after several police officers were shot in downtown Dallas, Thursday, July 7, 2016. At least two snipers opened fire on police officers during protests Thursday night; some of the officers were killed, police said. (AP Photo/LM Otero)

AP Photo/LM Otero

Dallas police stand watch after police officers were shot in downtown Dallas, Thursday, July 7, 2016. (AP Photo/LM Otero)

AP Photo/LM Otero

Dallas police move to detain a driver after several police officers were shot in downtown Dallas, Thursday, July 7, 2016. At least two snipers opened fire on police officers during protests in Dallas on Thursday night; some of the officers were killed, police said. (AP Photo/LM Otero)

AP Photo/LM Otero

Dallas police move to detains a driver after several police officers were shot in downtown Dallas, Thursday, July 7, 2016. Snipers apparently shot police officers during protests and some of the officers are dead, the city’s police chief said in a statement. (AP Photo/LM Otero)

AP Photo/LM Otero

Bystanders run for cover after shots fired at a Black Live Matter rally in downtown Dallas on Thursday, July 7, 2016. Dallas protestors rallied in the aftermath of the killing of Alton Sterling by police officers in Baton Rouge, La. and Philando Castile, who was killed by police less than 48 hours later in Minnesota. (Smiley N. Pool/The Dallas Morning 海角社区app)

Smiley N. Pool/The Dallas Morning 海角社区app

A Dallas Area Rapid Transit police officer receives comfort at the Baylor University Hospital emergency room entrance Thursday, July 7, 2016, in Dallas. Police say one rapid-transit officer has been killed and three injured when gunfire erupted during a protest in downtown Dallas over recent fatal shootings by police in Louisiana and Minnesota. (Ting Shen/The Dallas Morning 海角社区app via AP)

Ting Shen/The Dallas Morning 海角社区app via AP

A Dallas policeman keeps watch on a street in downtown Dallas, Thursday, July 7, 2016, following reports that shots were fired during a protest over two recent fatal police shootings of black men. (AP Photo/LM Otero)

AP Photo/LM Otero

Protesters march during a Black Live Matter rally in downtown Dallas on Thursday, July 7, 2016. Multiple media outlets report that shots were fired later Thursday during the protest over two recent fatal police shootings of black men. (Smiley N. Pool/The Dallas Morning 海角社区app via AP)

Smiley N. Pool/The Dallas Morning 海角社区app via AP

Law enforcement sweep the area after a shooting in downtown Dallas, Friday, July 8, 2016. At least two snipers opened fire on police officers during protests in Dallas on Thursday night; some of the officers were killed, police said. (AP Photo/LM Otero)

AP Photo/LM Otero

An unidentified woman and a law enforcement officer reach for each other’s hand as they walk out of the Baylor University Medical Center emergency reception area, early Friday, July 8, 2016, in Dallas. (AP Photo/Tony Gutierrez)

AP Photo/Tony Gutierrez

Emergency responders administer CPR to an unknown patient on a stretcher as law enforcement officials stand nearby at the emergency receiving area of Baylor University Medical Center, early Friday, July 8, 2016, in Dallas. (AP Photo/Tony Gutierrez)

AP Photo/Tony Gutierrez

A clerk looks at broke windows shot out at a store in downtown Dallas, Friday, July 8, 2016. Snipers opened fire on police officers in the heart of Dallas during protests over two recent fatal police shootings of black men.(AP Photo/LM Otero) — A clerk looks at broke windows shot out at a store in downtown Dallas, Friday, July 8, 2016. Snipers opened fire on police officers in the heart of Dallas during protests over two recent fatal police shootings of black men. (AP Photo/LM Otero)

A man raises his hands as he walks near a law enforcement officer, following the shootings Thursday of several police officers in downtown Dallas, early Friday, July 8, 2016. (AP Photo/LM Otero)

AP Photo/LM Otero

A Dallas police officer covers his face as he stands with others outside the emergency room at Baylor University Medical Center, Friday, July 8, 2016, in Dallas. Snipers opened fire on police officers in the heart of Dallas on Thursday night, killing some of the officers. (AP Photo/Tony Gutierrez)

AP Photo/Tony Gutierrez

Police and others gather at the emergency entrance to Baylor Medical Center in Dallas, where several police officers were taken after shootings Thursday, July 7, 2016.. (AP Photo/Emily Schmall)

AP Photo/Emily Schmall

Maria R. Olivas/The Dallas Morning 海角社区app via AP

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 Dallas, Friday, July 8, 2016. At least two snipers opened fire on police officers during protests in Dallas on Thursday night; some of the officers were killed, police said. (AP Photo/LM Otero)

AP Photo/LM Otero

Smiley N. Pool/The Dallas Morning 海角社区app

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