The commission 's decision on December 10 , 1864 , found the men guilty on all charges . Bowles , Milligan , and Horsey were sentenced to hang on May 19 , 1865 ; Humphreys was found guilty and sentenced to hard labor for the remainder of the war . The sentence for Humphreys was soon modified , allowing his release , but he was required to remain within two specific townships in Greene County , Indiana , and could not participate in any acts that opposed the war . Efforts were made to secure pardons for Bowles , Milligan , and Horsey , with the decision passing to President Andrew Johnson following Abraham Lincoln 's assassination . On May 16 , 1865 , three days before their execution , the executions of Bowles and Milligan were postponed to June 2 , and Horsey 's sentenced was commuted to life imprisonment . President Andrew Johnson commuted the sentences for Bowles and Milligan to live imprisonment on May 30 , 1865
Abraham Lincoln 's assassination
Assassination of Abraham Lincoln
William A. Bowles