First, there is and was no AMI anthrax letter.
Second, there was no anthrax spore-trail through garbage bags, trash cans, and garbage trucks.
That means that no one threw an anthrax letter away.
Ergo, the “AMI anthrax letter” theory has no exit path to explain the “missing” letter.
The absence of evidence is NOT EVIDENCE.
What is your evidence that there was "no anthrax spore trail through garbage bags, trash cans and garbage trucks"?
Is it something that you just made up?
The entire building was contaminated. The cleaning crew should have been dumping vacuum cleaner bags containing spores into trash cans and garbage trucks. The areas around copy machines were thoroughly contaminated, so the waste paper from those areas should have gone into trash cans and garbage trucks, too.
What is your evidence that there was no such trail?
And, if you have evidence, how do you explain that there was no trail from cleaning crew, either?
Wouldn't that mean that your argument is that there was no anthrax in the AMI building at all?
And, of course, that would mean that the anthrax couldn't have come from the money, either.
No matter how you look at it, you have no evidence to support your beliefs, because all the evidence says that the anthrax that killed Bob Stevens came in a letter addressed to the National Enquirer that was opened and thrown away by Stephanie Dailey.
Your arguments do not change the facts, they only verify the facts which say that the anthrax came in a letter - because you must ignore the facts in order to make your argument.