Just a word to the wise. Asking a potential client if he is LE is ludicrous. A cop can say "no" and still not violate the entrapment statutes. Entrapment is a different ball game that involves a law enforcement official coercing an individual to commit a crime he or she wouldn't ordinarily commit.
Ya'll remember Back to the Future? Check out the case of John Delorean. He is the engineer that designed the car in that film. He was also involved in one of the most famous cases of entrapment in American history.