Two Pocatello men pleaded guilty to crimes linked to an illegal drug operation involving thousands of dollars' worth of spice and marijuana.

John D. Heim pleaded guilty Thursday to money laundering charges, while William Ray Carringer pleaded guilty to intent to distribute marijuana.

The 40-year-old Heim operated a business that sold spice, or synthetic marijuana, as part of an operation prosecutors say reaped more than $163,000 in illicit proceeds.

Carringer, who is 23, pleaded guilty to retrieving a FedEx package addressed to him containing more than five pounds of marijuana that he told prosecutors he intended to sell.

Heim faces up to 20 years in prison, while Carringer faces five years.

They're due to be sentenced Dec. 27 in U.S. District Court in Pocatello by Judge B. Lynn Winmill.