Lt. Travis St. Pierre, of the New Orleans Police Department, shows off a body-worn camera during a press conference in January. Brett Duke/The Times-Picayune/Landov hide caption

itoggle caption Brett Duke/The Times-Picayune/Landov

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

itoggle caption Oliver Hardt/Getty Images