First off, has it been determined that AHB's are that far north.
I sent my Suspects to the University Of Georgia. Of course I'm in Ga.
Catch about fifty to 100 in a quart jar, spray with either or if you can get the denatured alcohol in to the jar with out loosing many bees. I then put mine in a 8 or 12 ounce plastic honey bottle "don't remember which" and in a padded envelope.
The nearest Bee lab or University that does bee work should accept them.
That's why I am skeptical. According to what I can find there is no confirmed existence of AHB in Missouri. I am thinking they are just a bit aggressive. My wife and I viewed the tree and never got head butted, but a few did buzz by our heads. Keep in mind the entrance is about 15' up. I got a few pictures but it was cloudy that day. I will check on what Universities do bee work. I don't think Mizzou does, they do have an entomology department, but nonspecific to honey bees.