In June 1932 Dennison suffered, and recovered from, a paralytic stroke. In August of that year Dennison and 58 of his associates went on trial for conspiracy to violate the Volstead Act. Tom Dennison was indicted in the liquor conspiracy case; however, the trial resulted in a hung jury and was declared a mistrial.(2007) "History at a Glance" , Douglas County Historical Society. p 90. Retrieved 5/13/08. That December he nearly died from pneumonia.
