"Artists don't usually tell long, rambling stories at the Tiny Desk, and if they do, those stories don't usually make the final cut. But this one felt different. It was about the time Christian Scott aTunde Adjuah, a young black man, says he was stopped by New Orleans police late at night for no reason other than to harass and intimidate him. And how his pride almost made him do something ill-advised about it. And how he finally channeled that pent-up frustration into a piece of music whose long-form title is "Ku Klux Police Department.""