Yik Yak is a an app that allows users to communicate anonymously with anyone within a 10-mile radius. At Colgate University in upstate New York, the anonymity brought out a particularly vicious strain of racism that shook the school.
Elementary: End of Watch Season 3, Ep 8
Sherlock, Kitty, and Joan investigate the murder of a Highway Patrol officer, whose sidearm has been replaced with an airsoft gun, and uncover a connection to a wanted arms dealer. Meanwhile, Sherlock deals with a fellow recovering addict who is blogging comments Sherlock makes at his group meetings.