An 80-year-old man who pleaded guilty to running a sprawling multi-state marijuana-dealing operation faces sentencing in federal court.

Marshall Dion faces up to seven years in prison under a plea agreement with prosecutors who say Dion has been selling marijuana for decades.

In 1985, Dion crashed a single-engine plane in Kenosha County, Wisconsin, and then crawled along a field with two broken ankles as cash floated in the air. He denied that the $112,000 recovered from the crash scene was his.

A stop for speeding in 2013 in Junction City, Kansas, led authorities to Massachusetts and Arizona, where they found about $15 million in cash, nearly 400 pounds of marijuana and ledgers detailing drug deals going back to 1992.

Sentencing is scheduled Thursday afternoon in U.S. District Court in Boston.

(Copyright (c) 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)

Join our Newsletter for the latest news right to your inbox