Well, there are some “funny” lookin’ planes parked nearby in older sat pics.
I still think you should contact the CIA/IC to see if he was ever their guy.
The A/C are from Janet Aviation.
A highly classified small fleet of passenger aircraft known as “Janet” is operated for the United States Air Force to transport military and contractor employees. It mainly serves the Nevada National Security Site (most notably Area 51 and TTR), from their terminal at Las Vegas’ McCarran International Airport. The fleet’s “Janet” call sign, from which its de facto name comes, is said to stand for “Just Another Non-Existent Terminal”
Janet has nothing to do with this shooter.