Many St. Louisans likely have dim memories of the 2001 murder of Columbia (Mo.) Tribune sports editor Kent Heitholt. But for the Ferguson family, that tragic event has remained all too vivid. Convicted of the crime — which took place when he was a 17-year-old high-school student — Ryan Ferguson received a 40-year prison sentence in 2005. "Dream/Killer" tells the story of Ryan’s father, Bill Ferguson, as he sought to uncover the truth and overturn the verdict. This riveting chronicle of Bill’s decade-long pursuit to free his son and best friend features a cast of characters who represent both the best and the worst of the American judicial system: questionable district attorney-turned-judge Kevin Crane, who stubbornly insisted on Ryan’s guilt despite clear evidence to the contrary; high-powered Chicago attorney and wrongful-conviction specialist Kathleen Zellner, who joined Bill in his long quest for justice (she also represented Steven Avery of Netflix’s “Making a Murderer”); and sadly confused Chuck Erickson, who not only confessed to a murder based on a dream but also claimed that former classmate and friend Ryan served as his co-conspirator. And at the film’s vital heart is Bill Ferguson, who uses his self-taught investigation skills and relentless creativity to give his son a slim and hard-earned chance at freedom.