The guy that actually did it, the elder McMichael, was in fact a cop for 20 years, so to answer your question, *YES*, a "cop" would call that "reasonable suspicion" because a cop did in fact do it.
Second, in making an arrest, would any COP have shouted he was going to blow the guy’s head off? NOT VERY DAMN LIKELY!
Are you on drugs? Cops do that all the f***ing time. It isn't even remarkable. Do you want an example?
Go to youtube and find that video of that cop in Las Vegas that shot that man to death in the hallway of that hotel while the man was begging him not to kill him.
The cop told him over and over again that he would blow his f***ing head off if he made one wrong move. The man was unarmed, on his knees and begging not to be shot.
And guess what? They didn't prosecute that cop.
The Mesa cop was a prime example of how hideous SOME cops behave. He was charged with 2nd degree murder but acquitted - IMHO, due in part to evidence not allowed into the trial. The city was sued by the victim’s parents and paid $1.5 million.
You want to SEE what crappy cops can do and get away with it?
https://www.youtube.com/watch?v=zIUnEWYdPnI
71 shots put into 5 homes. They were not charged and at least had much better reason for opening fire. But the various cities still ended up paying $3.4 million to the widow.
“the elder McMichael, was in fact a cop for 20 years”
I know. I also know REAL cops have to justify their “probable cause” versus this retired idiot acting on his own.