that offered earlier by Rep. Michael McCaul, R-Texas, chairman of the House Homeland Security Committee. He said police had arrived at Ciancia's apartment about 45 minutes after the suspect had left for the airport. According to the LAPD account, they arrived 52 minutes after the shooting, which began about 9:20 a.m., according to police. It was not immediately clear when Ciancia left for the airport. The attack About 9:20 a.m. Friday, Ciancia walked up to a Transportation Security Administration checkpoint in Terminal 3. He pulled a.223 - caliber assault rifle from a bag and shot TSA officer Gerardo Hernandez at point-blank range, according to a court document filed by an FBI agent. Ciancia then went up an escalator but returned to shoot Hernandez again, apparently after seeing him move. He continued walking and shooting. Witnesses said he went from person to person, asking, Are you TSA ? I just shook my head, traveler Leon Saryan told CNN's Anderson Cooper. And he kept going. Chaos and terror inside LAX Terminal 3 The victims Hernandez, 39, was the first TSA officer to die in the line of duty since the agency was created in 2001. He took pride in his duty for the American public and for the TSA mission, said his wife, Ana Hernandez. The couple, who married in 1998, have two children. Two other TSA officers -- James Speer, 54, and Tony Grigsby, 36 -- were wounded but were