http://crime.about.com/od/history/p/sheppard_sam.htm
Marilyn Sheppard was brutally murdered while her husband, Dr. Sam Sheppard, slept downstairs. Dr. Sheppard was sentenced to life in prison for the murder. He was eventually freed from prison but the scars of the injustices he had to endure were permanent. F. Lee Bailey fought for Sheppard's freedom and won.
I don't think Shepard murdered Marilyn and I believe he was wrongly imprisoned. He ended up as a professional wrestler which led to his early death.
Someone broke into the Shepard house in an early morning in 1954 and beat Marilyn Shepard to death. The crime scene photos are particularly gruesome. There was never any reasonable point put forward for Shepard's wish to murder his wife because there was none. He was railroaded.