In a signed, handwritten note Ciancia carried with him, he said he wanted to install fear into the "traitorous minds" of TSA officers, Bowditch said.
Witnesses told local media that Ciancia asked people at the checkpoint of Terminal 3, whether they were TSA, and opened fire only at TSA officers.
Gerardo I. Hernandez, 39, who was working in the pre-screening area was killed. Video shows Ciancia shooting Hernandez multiple times.
The Terminal 3 reopened Saturday. A total of 1,550 flights with an estimated 167,050 passengers were affected at LAX Friday, an airport spokeswoman said. It is the third largest airport in the US.
TSA security agents at LAX and nationwide began wearing black mourning bands Friday in honour of Hernandez, the first TSA agent to die in the line of duty in the agency's 12 years of existence.