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This frame grab provided by abc15.com shows the scene at a Phoenix office complex where police say a gunman shot at least three people on Wednesday, Jan. 30, 2013. Officer James Holmes said the victims were taken to hospitals and did not know if their injuries were life threatening. (AP Photo/abc15.com)

A woman is taken to a paramedic truck from an office building where a shooter opened fire in north central Phoenix on Wednesday, Jan. 30, 2013. (AP Photo/The Arizona Republic, Michael Schennum)

SWAT police officers inspect the roof of an office building after a shooting at the building in Phoenix on Wednesday, Jan. 30, 2013. A gunman opened fire at the Phoenix office building, wounding three people, one of them critically, authorities said. Police were searching for the shooter. (AP Photo/Patrick Sison)

This frame grab provided by abc15.com shows the scene at a Phoenix office complex where police say someone shot at least three people on Wednesday, Jan. 30, 2013. Officer James Holmes said the victims were taken to hospitals and did not know if their injuries were life threatening. (AP Photo/abc15.com)

This frame grab provided by abc15.com shows the scene at a Phoenix office complex where police say someone shot at least three people on Wednesday, Jan. 30, 2013. Officer James Holmes said the victims were taken to hospitals and did not know if their injuries were life threatening. (AP Photo/abc15.com)

Police officers leave an office building after a shooting at the building in Phoenix on Wednesday, Jan. 30, 2013. A gunman opened fire at the Phoenix office building, wounding three people, one of them critically, authorities said. Police were searching for the shooter. (AP Photo/Patrick Sison)

A Phoenix Police Department officer, puts up police tape near a home of a suspected gunman who opened fire at a Phoenix office building on Wednesday wounding three people, one of them critically, and setting off a manhunt that led police to surround his house for several hours before they discovered he wasn't there Jan. 30, 2013, in Phoenix. Authorities believe there was only one shooter, but have not identified him or a possible motive for the shooting. They don't believe the midmorning shooting at the complex was a random act. (AP Photo/Ross D. Franklin)

A SWAT police officer leaves the scene after inspecting an office building after a shooting at the building in Phoenix on Wednesday, Jan. 30, 2013. A gunman opened fire at a Phoenix office building on Wednesday, wounding three people, one of them critically, authorities said. (AP Photo/Patrick Sison)

People watch a women being taken to a paramedic truck from an office building where a shooter opened fire in north central Phoenix on Wednesday, Jan. 30, 2013. (AP Photo/The Arizona Republic, Michael Schennum)

People are escorted back into an office building by a police officer, second left, after a shooting at the building, background right, in Phoenix on Wednesday, Jan. 30, 2013. (AP Photo/Patrick Sison)

A member of the Phoenix Police Department SWAT team leads a female neighbor away to safety, as the the SWAT team prepares to enter the home of a suspected gunman who opened fire at a Phoenix office building, wounding three people, one of them critically, and setting off a manhunt that led police to surround his house for several hours before they discovered he wasn't there, Wednesday, Jan. 30, 2013, in Phoenix. Authorities believe there was only one shooter, but have not identified him or a possible motive for the shooting. They don't believe the midmorning shooting at the complex was a random act. (AP Photo/Ross D. Franklin)

Members of the Phoenix Police Department, including the SWAT team, back left, surround the home of a suspected gunman who opened fire at a Phoenix office building, wounding three people, one of them critically, and setting off a manhunt that led police to surround his house for several hours before they discovered he wasn't there, Wednesday, Jan. 30, 2013, in Phoenix. Authorities believe there was only one shooter, but have not identified him or a possible motive for the shooting. They don't believe the midmorning shooting at the complex was a random act. (AP Photo/Ross D. Franklin)

Members of the Phoenix Police Department SWAT team exit the garage at the home of a suspected gunman who opened fire at a Phoenix office building, wounding three people, one of them critically, and setting off a manhunt that led police to surround his house for several hours before they discovered he wasn't there, Wednesday, Jan. 30, 2013, in Phoenix. Authorities believe there was only one shooter, but have not identified him or a possible motive for the shooting. They don't believe the midmorning shooting at the complex was a random act. (AP Photo/Ross D. Franklin)