Like he says, if BATFE gives you a tip,

especially on a possible federal violation, and wants you do to the work...
Clue to local authorities: when a Federal agency has jurisdiction, and it's a big case that will draw publicity but they hand it to you .... that's right up there with an email from a guy who says he's a Nigerian bank president, has embezzled $10 million, and would like to wire it to you. They have a grudge against the guy, but know they have no case.
And if you add to the mess by saying you're an expert when you don't know squat, and act like assholes during the raid, and lie about not having photos of the seized property at the time of seizure, then you're both a sorry excuse for a lawman and generally a lying dirtbag.