PRESCOTT, Ariz. (AP) — A former Washington state businessman accused of discarding human remains in remote areas of central Arizona has pleaded not guilty in the case.

Walter Mitchell was arraigned today in Yavapai County Superior Court. The indictment charges Mitchell with 29 counts of concealing or abandoning a dead body.

Authorities say they tied Mitchell to the body parts that included legs, arms and heads through tags that were found with the remains outside Prescott in late December.

Authorities say Mitchell moved to Arizona from Washington state last year and had a business that managed cadavers for research.