Is Police Body Camera Video Unbiased?

The attorney for the white and now former University of Cincinnati police officer who shot and killed an African-American motorist during a traffic stop earlier this month says he was shocked his client was charged with murder yesterday. Officer Ray Tensing is due to appear in court today. His attorney says his client didn't intend to kill Samuel DuBose. The video captured by Tensing's body camera played a key role in his indictment. But the author of a new article on the increasing use and costs of police body cameras says the impact of such footage is not so clear.  Journalist Mya Frazier writes about police body cams in the latest issue of Harper's magazine. She tells Alison Holm body camera footage may not be the unbiased witness supporters believe.