On Skid Row in Los Angeles, where thousands of poor, homeless people live — many of them black — questions of how police should use force and interact with people come up all the time. We embed with both the police and the locals after the police shot and killed an unarmed black man. And we see what police tactics, from glad-handing to tough love, look like up close. Follow Kelly McEvers on Twitter @kellymcevers and Tom Dreisbach @TomDreisbach. Email us at firstname.lastname@example.org.