Sheppared claimed a man broke into the house and that he, Sheppard, fought to defend his wife, receiving injuries in the attack but failing to prevent the murder. The state claimed that Sheppard’s injuries were inflicted by his wife as she attempted unsuccessfully to defend herself from her husband.
He spent 10 years in prison for the crime. When he got out, things got weird.
The Memory Palace podcast has the story: Finishing Hold