DULUTH, (AP) - The owner of a downtown Duluth head shop and his son have been charged with selling controlled substances.

Jim Carlson is the owner of the Last Place on Earth. He and his son, Joseph Gellerman, were arrested Friday as police raided the store.

The St. Louis County Attorney's Office says the pair face multiple counts stemming from the sale of synthetic drugs to undercover officers.

County Attorney Mark Rubin says in a statement that his office will make sure those who sell synthetic drugs are held accountable.

Carlson told the court on Monday that his attorney and others tell him his products are legal.

Carlson, Gellerman, and two others were indicted on 54 federal counts last year. That trial is set for September.