On Monday, the union representing 45,000 federal security agents called for the creation of a class of armed Transportation Security Administration officers with law enforcement training and the authority to arrest people.
TSA Administrator John Pistole said his agency would review its protocols after Friday's attack.
Atty. Gen. Eric H. Holder Jr. also weighed in Monday, saying that the government should examine the agency's role in protecting airports.
TSA Agent Gerardo I. Hernandez was killed and at least three other people were wounded Friday morning when a gunman identified by police as 23-year-old Paul Anthony Ciancia opened fire at the entrance to an LAX security checkpoint, sending travelers scrambling for cover and grounding flights for hours.
Ciancia, who authorities said was targeting TSA officers and left an anti-government suicide note, continued his rampage up an escalator and down a long corridor deep into Terminal 3 before being shot by airport police.
In a search warrant affidavit for Ciancia's cellphone, FBI officials said Ciancia's roommate dropped him off at the Virgin Airlines terminal Friday morning after Ciancia "entered his room unannounced and asked to be driven to LAX."
The roommate didn't learn about the shooting until he returned to his apartment, according to the warrant, which was signed Monday.
The roommate would later let law enforcement officers search his vehicle for evidence, and authorities recovered an LG VX9100 cellphone, which the roommate said he thought belonged to Ciancia.
The phone was missing a battery, and the affidavit said authorities recovered an LG battery from the phone near Ciancia when he was apprehended.
The documents also said authorities had obtained a handwritten note from a bag Ciancia was carrying, which “professed a desire to kill multiple TSA employees and made reference to his concerns about a New World Order.”
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