Again, it's perfectly fine for the man to request his cue back, it's not at all OK to use threats of retaliation to strong arm the guy into doing so. This is clearly a case of a guy being 100% in the right and yet handling it wrong.
It's also not OK to call the guy a thief and a pathological liar, but libel is not a crime, only a tort... unless you live in a state that has a statute making libel a crime. In Colorado criminal libel is a class 6 felony. In Florida (the state Mr. Showman lives in) there are five types of criminal libel. One of them allows charges to be brought against the publisher of said libel, so much of the defamation that is allowed to go on here in AZ could lead to charges being brought against Mike Howerton himself.
http://www.firstamendmentcenter.org/criminal-libel-statutes-state-by-state
Another internet lawyer that put Detective Google on the case. LOL