The name of the prison where he was serving time is called Jefferson City Correctional Center.
His release date was Tuesday, Sept. 1, 2015.
He was serving a life sentence.
Part of the reason he was released after twenty years is family, friends, and activists spoke with lawmakers and other officials regularly, reminding them that Jeff was being punished too harshly and that growing and distributing marijuana should not be a punishable offense.
For more information check out this article on Hemp News.
Photo Credit: Free Jeff Mizanskey Facebook