(STURGIS) – A Sturgis man could be going to prison for a long time and facing a heavy fine.

According to Wood TV, 47 year old Erik Miller has been arrested on charges of having controlled substances and conspiring to distribute them; selling counterfeit drugs and being a felon with a firearm.

Federal officials say Miller was working with a vendor on the dark web to sell fake Xanax pills, real prescription drugs and illegal controlled substances such as Ecstasy. Investigators say the fake pills were made to look like Xanax pills.

Authorities say the counterfeit pills have different ingredients than the true medication. Many times they may not have an active ingredient, the incorrect active ingredient or the wrong quantity of the correct active ingredient. The counterfeit pills may also have deadly amounts of fentanyl or meth inside of them.

It is not known what was in the fake pills Miller was selling.

If he is convicted, Miller is facing up to 20 years in prison and a $1 million dollar fine.