A preliminary coroner's report said a bullet hit Hernandez's aorta, the main artery in the body, which would have caused the massive bleeding, according to a law enforcement official familiar with the findings. The official was not authorized to speak publicly about the investigation and spoke to AP on condition of anonymity.
In the chaos after the shooting, officers from multiple agencies checked on Hernandez before moving on, including at least one within three minutes of him being shot; no officers rendered first aid on scene, according to surveillance video reviewed by two law enforcement officials, who spoke on condition of anonymity because they weren't authorized to speak publicly about the investigation.
Officials were examining what conversations took place between police and fire commanders to determine when it was safe enough to enter, and whether paramedics could have gone into the terminal earlier, one of the officials said.
Airport officials said in a statement Wednesday that agencies are conducting "numerous investigations" and would release a report once the probes are completed.
News of how long it took to get Hernandez medical aid prompted the head of the TSA union, J. David Cox Sr., to say he was appalled and a local TSA union official said a more timely response might have saved Hernandez's life. The Los Angeles Police Department is investigating whether one of its officers improperly told other responders that Hernandez was dead when he checked on him five minutes after the shooting.
Airport police union President Marshall McClain has said the officer shouldn't have been the one to determine whether Hernandez was dead and should have helped him. While it was unclear if the officer was qualified to assess Hernandez's medical condition, the coroner's finding indicates Hernandez was likely dead at that point.