I've never identified myself on this forum, and much prefer to lurk and read, than post, but I am a DEA agent, and have been one for almost eighteen years, and who, until recently, was assigned to the Miami Field Division. But at the point someone uses DEA to try and smear someone's reputation, I will.
That story about Mas Ayoob is simply not true. Something else should be pointed out. Many instructors will have DEA FTU agents come to their classes to take firearms instruction, and will put that on their resumes as "trained DEA", when for all anyone knows, the agents went back to Quantico and said, "what a total waste of money".
On the other hand, only a very small number of firearms instructors are judged to be so good that are actually invited to Quantico to teach instructors and agents, or even fewer, sent to the field offices to teach agents. Mas Ayoob was one of those few.
Those in law enforcement know that one of the worst things that can be said about somebody is that he wouldn't go though a door on a high risk warrant or raid. Trying to damage someone's reputation by attributing statements like that to another agency is worse.
And, if someone claims to be a DEA agent, or former DEA agent, in a training class like that, ask them their basic agent class that they graduated from and in what year. That's not secret squirrel info because only another DEA employee could ever check and verify it or know any more about you from knowing it.
I graduated from BA-80, in 1991. And, my primary FTU was Robert M.