well, you could zap him...and then try and bring him back.
How about a slow, painful death. Crushing him between two large stones sounds good.
One would hope so.
From Crime & Capital Punishment:
During the sentencing phase, jurors heard testimony that [Warner] had previously sexually and physically abused his ex-wife and a five-year-old girl. Warner's seven-year-old son testified for the prosecution that he had witnessed his father abuse Adrianna on previous occasions. During the ultimately fatal attack she was sexually molested. She had a six-inch skull fracture, a broken jaw, three broken ribs, bruised lungs and a lacerated liver and spleen.