I would do both .. use the coarse test to scrap everything not within 3%-5% of human. There should be nothing native to North America that close. I'm not sure where Central American primates would fall in that test, but they should not be in the US or Canada. Use the finer test to look at what's left in a much more detailed way.
MIB
Exactly.
If it missed by an inch and a half, it probably was an accidental miss...not on purpose.
I wouldn't put this into the 'warning shot' category.
This is a 80 pound one so if it was close to this and it left a 4" or 5 inch impression in the ground when it hit that's a big rock to throw 47 yards .