Biography
Lambdin P. Milligan was an Indiana lawyer and Copperhead Democrat who in October 1864 was arrested by Union military authorities at his home in Huntington County, Indiana, and tried by military commission for conspiracy against the U.S. government in connection with the Sons of Liberty plot. Sentenced to hang. President Andrew Johnson commuted the sentence to life imprisonment in May 1865. The U.S. Supreme Court ruled unanimously in Ex parte Milligan (April 3, 1866) that civilians could not be tried by military tribunals where civilian courts were open and functioning, voiding his conviction. He was released April 10, 1866 and lived another 33 years.
Case
Indianapolis Federal Military Prison