PoliticsNation with Al Sharpton 03/23/12

Still no arrests in Trayvon Martin case after 27 days

It has been 27 days since 17-year-old African-American student Trayvon Martin was shot and killed within a gated community in Florida, and meanwhile his shooter, George Zimmerman, has walked free. MSNBC host Melissa Harris-Perry and Florida State Sen ... more Duration: {{video.duration.momentjs}}