Strange Shooting At Last Stop, AZ.

From the LVRJ: Authorities said a 9-year-old girl accidentally shot her shooting instructor in the head in northwestern Arizona.
Mohave County Sheriff’s officials say the 39-year-old shooting instructor was shot at an outdoor range in Dolan Springs about 10 a.m. Monday.
Details weren’t immediately released.
Sheriff’s officials say the man was airlifted to a medical center in Las Vegas, and his condition wasn’t immediately known.
The name of the man and the 9-year-old girl weren’t released.
Authorities said the girl was at the shooting range with her parents and the family was on vacation.  http://www.reviewjournal.com/news/nevada-and-west/shooting-instructor-accidentally-shot-9-year-old
The incident actually happened at the Last Stop store/restaurant, about 20 miles into Arizona, about 40 miles from Las Vegas.
We traveled to Las Vegas from Kingman and we saw the scene shortly after it happened.
We saw 2 Mohave sheriff deputy's pass us on the road as they were on their way to the scene.
At the same time, 2 Arizona Highway patrol officers were close by, giving a truck with an oversized load an escort and they drove by the scene but did not stop to help.
The rescue helicopter was not at the scene yet and it is possible they passed by the scene shortly after the shooting, especially since the ambulance had to travel a long way to the scene, maybe from Dolan Spring or Willow Beach.  If they came from Dolan Springs, that is at least a 20 minute drive, going red lights and siren.
Instead of telling the truck to stop and then assist at the scene, they just kept on driving.
And I also must say that it sure took a long time for the rescue helicopter to get to the scene.  We passed the scene at least 20 minutes after it happened and maybe even longer.
We saw the guy laying on the ground, about 50 feet from the building and near the fence, where they take the shooters.
Hopefully, the guy will be ok.  We have stopped at Last Stop many times, especially to buy lottery tickets when we lived in Vegas, so we probably saw the man at least once, if not many times.
Last Stop has a restaurant, a gift shop and sells a lot of lottery tickets.  It is a tourist hangout and many tours stop there.  You can fire many different kinds of guns, including a large caliber machine gun.
So, I do hope there is an investigation, not only into the shooting but why the Arizona Highway Patrol (DPS) did not stop and help render aid and assist at the scene.