
Police tape surrounds a vehicle searched by authorities, Monday, May 4, 2015, in Phoenix, believed to belong to one of two gunmen who were shot and killed the night before outside a venue hosting an exhibit about the Prophet Muhammad in suburban Dallas. Garland, Texas, police officer Joe Harn says the men had opened fire with assault rifles, and that one officer had fatally shot both gunmen.
Ross D. Franklin/AP Photo

Garland Police spokesperson Joe Harn addresses the media during a news conference at the Garland Police Department, May 4, 2015, in Garland, Texas.
Brandon Wade/AP Photo

In this photo provided on Monday, May 4, 2015, Dutch lawmaker Geert Wilders, leader of the anti-Islam Freedom Party, center, poses for a photograph with police officers who responded to a shooting outside a provocative contest for cartoon depictions of Prophet Muhammad in Garland, Texas.
Geert Wilders/AP Photo

FBI crime scene investigators document the area around two deceased gunmen and their vehicle outside the Curtis Culwell Center in Garland, Texas, May 4, 2015.
Brandon Wade/AP Photo

An FBI crime scene investigator documents the area around two deceased gunmen and their vehicle outside the Curtis Culwell Center in Garland, Texas, May 4, 2015.
Brandon Wade/AP Photo

FBI crime scene investigators document the area around two deceased gunmen and their vehicle outside the Curtis Culwell Center in Garland, Texas, May 4, 2015. Police shot and killed the men after they opened fire on a security officer outside the suburban Dallas venue, which was hosting provocative contest for Prophet Muhammad cartoons Sunday night.
Brandon Wade/AP Photo

Garland Police spokesperson Joe Harn pauses as he addresses media about the shooting at the Curtis Culwell Center, May 3, 2015, in Garland, Texas.
LM Otero/AP Photo

A Texas state trooper stands guard at a parking lot near a community center in Garland, Texas, following a shooting, May 4, 2015.
LM Otero/AP Photo

Members of the Garland Police Department are stand inside the Curtis Culwell Center, May 3, 2015, in Garland, Texas.
Nomaan Merchant/AP Photo

An armed police officer stands guard at a parking lot near the Curtis Culwell Center, May 3, 2015, in Garland, Texas.
LM Otero/AP Photo

Police officers stand guard at a parking lot near the Curtis Culwell Center, May 3, 2015, in Garland, Tesxas.
LM Otero/AP Photo

Garland Police spokesperson Joe Harn addresses media about the shooting outside of a community center, May 3, 2015, in Garland, Texas.
LM Otero/AP Photo

An armed police officer stands guard near the Curtis Culwell Center, May 3, 2015, in Garland, Texas.
LM Otero/AP Photo

A police officer briefs the crowd as attendees are prevented from leaving the Muhammad Art Exhibit and Contest after it was reported that shots were fired outside the venue in Garland, Texas, May 3, 2015.
Mike Stone/Reuters

People are sequestered by members of the Garland Police Department inside the Curtis Culwell Center, May 3, 2015, in Garland, Texas.
Nomaan Merchant/AP Photo