ATTN: Spoilers!!
I'm only giving the extra star because I believe good intentions were there. Unfortunately, the technical and procedural research was not. When you have several ongoing investigations at an Airport, normal functions would never continue. You had what would have been a death investigation of a Police Officer inside the terminal and a person shot dead in the parking garage which would have involved an Active Crime Scene/Homicide Investigation. You also had a TSA Supervisor that was stabbed dead and concealed in a search room, not responding to radio transmissions and unaccounted for. This would have all resulted in a complete lockdown of the Airport and a search for possible Offenders and or evidence.
Any indication of Explosives and/or Biological Weapons in an Airport or on a Aircraft would have also resulted in a complete lockdown of the Airport and a response from pretty much every Federal Agency, Bomb, and HazMat Teams. In addition, there is NO Way that an LAPD Detective would be making the final call on whether a flight was clear for take off. The scope of the situation would have resulted in decisions being made by POTUS, Dept of Defense, FAA, FBI, Homeland Security, and Counter Terrorism.
Because of this lack of research in procedure and the functions of Law Enforcement and Gov't Agencies and the bad acting especially by the unconvincing LAPD Detective, I give this movie a sympathetic 2 stars.