This article in the New York Times talks about Trump's Clemency plans and mentions John Knock who is a nonviolent first time marijuana offender who is serving two life terms for a marijuana conspiracy in the 70s and 80s.
WASHINGTON — For those who view the Justice Department’s pardon system as slow and sclerotic, with its backlog of more than 11,000 cases, they need only look to the case of Matthew Charles.
Mr. Charles was sentenced in 1996 to 35 years in prison for selling crack cocaine. In prison, he took college classes, became a law clerk and taught fellow inmates. He was released early, in 2016, and began rebuilding his life, volunteering at a food pantry and even falling in love.