if there was a drugtest you failed then there would be evidence, which he doesn't have (unless you did fail a drug test). Take this case to the head of the company, and make sure the place who offered you a job knows what happened. It'll sort itself out

This is one of those times where the people chanting "Sue! Sue! Sue!" are actually correct. Take him to court.

1. Wrongful termination suit. 2. Explain it to the second shop and offer a drug screen as a show of good faith.

It's a pretty bad thing but you can easily fix it. The other shop could drug test you themselves or you could look for legal action against the shop that fired you

Defamation of character I'm pretty sure it illegal

I can't even begin to tell you how many laws he broke. Get in touch with the state of new york labor board. Also, his claim that you failed a drug test, if false, is a lawsuit you can win. Slander

Also, get a drug test immediately. (If you are clean) and you will have proof he lied

that's illegal i say you should sue is ass.

That's illegal, you should call a lawyer... An employer is only allowed to say that you worked for them and how long

Guess he didn't want to lose his sense of power. Immature, but not surprising.