BILLINGS, Mont. (AP) — The four remaining defendants in a Bakken oil leasing scam that duped unwitting investors across the country out of hundreds of thousands of dollars were found guilty on most charges on Wednesday by a Montana jury.

The verdicts against Steven William Carpenter, 56, Suzette Gulyas Gal, 55, Andras Zoltan Gal, 22, and Krisztian Zoltan George Gal, 29, followed a seven-day U.S. District Court trial before Judge Sam Haddon.