Kudos to this brave woman for aggressively taking down this gunman, after being shot. I am in awe of her actions!
There was a similar shooting in the 90’s at Fairchild AFB in WA. Luckily, only 5 died—especially considering the perp had an assault rifle. What’s amazing is the SP rode his mountain bike at full speed for almost a mile, confronted the gunman at 70 yards, and dropped him. I can’t imagine jumping off my bike after a sprint and facing down an assault rifle 70 yards away with only a pistol, and making the critical shots.
From Wikipedia
A significant event at Fairchild occurred on June 20, 1994 when Dean Mellberg, a deranged ex-Air Force member entered the base hospital and shot and killed five people and wounded many others. Mellberg had been discharged after failing psychological evaluations by base psychologists Maj. Thomas Brigham and Captain Alan London. At the time of the shooting, Fairchild’s hospital was an ungated facility. The gunman, armed with a Chinese-made MAC-90, an AK-47 clone [1] entered the office of Brigham and London and killed both men. Mellberg continued to move through the hospital, injuring and killing several people, including 8-year-old Christine McCaren. The gunman then walked out of the building into the parking lot, where after killing Anita Linder, was confronted by military police officer and airman Andy Brown. From approximately 70 yards (60 m) yards away, Brown ordered Mellberg to drop his weapon. After Mellberg refused, from a kneeling position Brown fired four shots from his 9mm pistol, two rounds hitting the perpetrator in the head and chest, killing him[2]. After an investigation it was concluded that Airman Brown was justified in his actions, saving countless lives, and was awarded the Airman’s Medal by President Clinton.
I would bet that your average murderous idiot with an AK is not too talented with the rifle. That makes distance your friend. If you close only sufficiently to assure that YOU hit, you increase the chances that the idiot won't hit you. Depending upon how much ammo I had, I might have to come within about 75 feet to be confident of getting hits.
It's an interesting tactical question.