Amid Mexico's Drug Wars, Vigilante Groups Are Taking The Law Into Their Own Hands

Amid the violence caused by Mexico's drug wars, armed vigilante groups in both Arizona and Mexico are taking the law into their own hands. The groups are the subject of a new documentary, Cartel Land, which premiered at the Tribeca Film Festival this week. Director Matthew Heineman joined HuffPost Live on Wednesday to discuss his new film. Watch the conversation in the video above.