MSNBC Live with Tamron Hall 12/21/15

Witness: I saw ‘this Oldsmobile plowing down people’

Authorities are trying to determine why a woman repeatedly plowed her car into a crowded sidewalk on the Las Vegas strip, killing one person and injuring 37 others. NBC’s Scott Cohn reports the latest from Las Vegas. Plus, Justin Cochrane who witnessed wh ... more Duration: {{video.duration.momentjs}}