Answer: Clement Vallandigham. He was born in New Lisbon, Ohio (now known simply as Lisbon) and led the Copperhead faction.
Vallandigham was a member of a legal team defending a man accused of murder. Vallandigham contended that the man who was shot had, in fact, pulled the trigger on himself while attempting to extract his pistol from his clothing. In trying to demonstrate this with what he thought was an unloaded pistol, Vallandigham inflicted a mortal wound on himself.
For whatever consolation it may have been, the other members of the legal team were able to use Vallandigham’s demonstration to convince the jury to find their client not guilty.