Harrison was convicted on federal charges stemming from a four-year multi-state investigation.
Investigators from three states and the federal government presented evidence in the case against Harrison.
Forensic scientists from Kansas, Oklahoma and Missouri also testified in the case.
Harrison will be sentenced on October 2 in federal court.
Cherokee county sheriff David Groves says Harrison was a major drug dealer and manufacturer in our area.
Groves says much of the testimony given during harrison's 3-day trial gave investigators leads in other cases as well.
He says he's confident more arrests will be made because of Harrison's conviction.