Supervisor Dan White murders San Francisco Mayor George Moscone and Supervisor Harvey Milk in 1978. His defense would claim "diminished capacity" to keep him from being sentenced to death. The media dubbed this "The Twinkie Defense". But, what really caused Dan White to become a double murderer? From L to R: Supervisor Harvey Milk, Mayor George Moscone, Dan White Sponsors: KIND Snacks - www.kindsnacks.com/once to try 10 KIND Bars for free - just pay shipping. Bissell BarkBath - www.bissell.com/once. Use the offer code ONCE at checkout to receive 2 free bottles of no rinse shampoo with your order.