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The Richmond Hill explosion took place on November 10, 2012, in the Richmond Hill subdivision in Indianapolis, Indiana, United States. The home of Monserrate Shirley was the center of the explosion that resulted in the deaths of next-door neighbors John "Dion" Longworth and his wife Jennifer, the injuries of seven others, and $4 million in property damage. Prosecutors alleged that the natural gas explosion was intentionally set to collect insurance money. Shirley, her boyfriend Mark Leonard, and three others were convicted and sentenced to prison on various charges, including felony murder for Leonard.