MSNBC Live with Tamron Hall 03/19/12

Grand Jury to investigate Trayvon Martin killing

The Congressional Black Caucus has asked the Justice Department to look into the Trayvon Martin case as a potential hate crime, saying it sets a horrific precedent for vigilante justice. Rep. Emanuel Cleaver, D-Mo., joins NewsNation to discuss. ... more Duration: {{video.duration.momentjs}}