Early on the morning of January 18, 1989, a security guard found Francke's body lying in a pool of blood on the floor of the North Portico of the Dome Building (the headquarters office of ODOC, not to be confused with the
Oregon State Capitol building) in
Salem. An autopsy revealed the cause of death to be a stab wound to the heart suffered the night before, and also revealed other "
defensive wounds". Francke was last seen alive by Dome Building staff at approximately 6:45 p.m. on January 17. Two senior staff leaving the Dome Building approximately 40 minutes later discovered his car parked in its designated spot outside the front entryway with the driver's door open. No obvious signs of forced entry on the vehicle were observed. The staffers locked and closed the car door, and returned to the Dome Building where they made numerous phone calls to other senior staffers in an effort to determine Francke's whereabouts, all to no avail. Security was notified at the nearby Communications Center, and the staffers left the Dome Building at approximately 8:05 p.m. Two other senior staffers, Richard Peterson, head of Institutions, and David Caulley, head of Planning and Budget, arrived at approximately 8:35 p.m. and conducted what they described as a meticulous search of the Dome Building, but found nothing amiss. They returned to their homes on the presumption that Francke was at a private dinner engagement. Police were never notified of the situation until the guard discovered the body nearly four hours later. At the trial, the state produced several witnesses (all of whom were criminal associates of Gable) who claimed that Gable confessed the crime to them after the fact. Swearingen was called to testify by the prosecution at the trial. No physical evidence was produced; however the prosecution was allowed to introduce as evidence a knife (purchased by investigators) which matched Francke's wounds; Gable's ex-wife testified that she had given Gable a similar knife. On June 27, 1991, Gable was convicted of six counts of
aggravated murder and one count of murder. He was sentenced to life in prison without possibility of parole. Gable continues to maintain his innocence. In October 2014, the
Federal Public Defender's Office sought to reopen the case on appeal. On April 18, 2019, U.S. Magistrate Judge John Acosta ruled that Frank Gable must be retried or released within 90 days, noting among other trial issues that many witnesses presented have since recanted, and that their testimony was obtained via coercive interrogation tactics and polygraph examinations. One particular action was the exclusion of the fact that another man had repeatedly confessed to the murder of Francke in John Crouse, a Salem resident and parolee at the time. Crouse had told law enforcement officers and members of his own family that he stabbed Francke when caught trying to burglarize Francke's car. While Crouse (no longer living by the time of the 2019 decision) had recanted his confession, Acosta found that the exclusion of Crouse's confession during the original trial violated Gable's due process rights. On June 28, 2019, Gable was released from prison. Under federal supervision, he eventually moved to Kansas and started work for a concrete contractor. In May 2023, Gable was granted a full release, with his indictment being dismissed with prejudice that meant the county would be barred from re-arresting or re-indicting him for the murder, with the conviction being expunged from his record. On April 14, 2025, Oregon House Majority Leader
Ben Bowman and Minority Leader
Christine Drazan sent a letter to FBI director
Kash Patel, asking the FBI to investigate the murder. ==Conspiracy theories==