Dylann Roof appears via video at his bond hearing on June 19 in North Charleston, S.C. Roof is charged with nine counts of murder and firearms charges in the shooting deaths at Emanuel African Methodist Episcopal Church. Getty Images hide caption

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Jonathan Treviño poses in front of a drug bust. Courtesy of Jonathan Treviño hide caption

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Jonathan Treviño shows seized contraband. The former police narcotics squad leader is currently serving 17 years in prison for reselling narcotics back to drug dealers. Courtesy of Jonathan Treviño hide caption

itoggle caption Courtesy of Jonathan Treviño

Linda Boyle (left) and Lyn Coleman hold a photo of their children, who were kidnapped in Afghanistan in 2012. Caitlan Coleman, an American married to Canadian Joshua Boyle, was pregnant when the couple was abducted. Bill Gorman/AP hide caption

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American Journalist James Foley, pictured in 2011. Foley's beheading at the hands of the Islamic State militant group has forced a debate over how the U.S. balances its policy of not paying ransoms. Steven Senne/AP hide caption

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Lydia Thompson/NPR

Attorney General Loretta Lynch speaks about a federal crackdown on Medicare fraud. With her are HHS Inspector General Daniel R. Levinson (from left), HHS Secretary Sylvia Mathews Burwell, FBI Director James B. Comey and Assistant Attorney General for the Criminal Division Leslie R. Caldwell. T.J. Kirkpatrick/Getty Images hide caption

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The "Louie Louie" record, shown in 2003 ahead of an eBay auction, was a huge hit in the '60s. The hard-to-decipher lyrics led to some sordid speculation among teen listeners — and some fretting among those teens' parents. Elaine Thompson/AP hide caption

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Federal investigators search for evidence at the scene of the Amtrak Sunset Limited wreckage near Hyder, Ariz., the day after the derailment. Eric Drotter/AP hide caption

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Detective Mark Williams (right) speaks with an officer in Richmond, Va. A decade ago, amid a surge in violent crime, Richmond police were identifying relatively few murder suspects. So the police department refocused its efforts to bring up its "clearance rate." Alex Matzke for NPR hide caption

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FBI headquarters in Washington. An independent review says the bureau has made strides since Sept. 11 but "needs to accelerate its implementation of reforms." Pablo Martinez Monsivais/AP hide caption

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