In times of extreme stress, aka terror, the body is flooded with adrenalin. You could take five people who witnessed the same event and would probably get five different accounts of what they witnessed.,.....
You can falsely remember if someone had brown hair or short hair, but you don’t falsely have a memory like “Oh, the police are here because I see someone wearing a helmet, body armor, and and gas mask.”
Either she saw this or she’s lying.