Diren Dede, a 17-year-old German exchange student, was fatally shot in the head and arm when he entered the garage of Markus Kaarma in Missoula, Mont., on April 27. Kaarma said it was self-defense, but a Montana jury recently found him guilty of deliberate homicide. Oliver Hardt/Getty Images hide caption

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German student Diren Dede was fatally shot after he entered the garage of Markus Kaarma in Montana last month. Dede was on a one-year high school exchange program to the U.S. Oliver Hardt/Getty Images hide caption

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Newtown, Conn., Dec. 20, 2012: Stuffed animals and a candle arrangement at a streetside memorial for the 20 children and six adults killed at Sandy Hook Elementary School. John Moore/Getty Images hide caption

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