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with grants from the hagler family and scott nathan and laura debonis.'!k >> narrator: tonight on frontline, an exclusive investigation. in the chaotic days after hurricane katrina... >> people were shot and killed by the new orleans police department. >> narrator: ...eleven civilians were shot by new orleans police officers... >> looting and other lawlessness will not be tolerated. >> narrator: ...as rumors circulated about a declaration of martial law. >> i've already called for martial law in the city of new orleans. >> i heard rumors that martial law was in place, and then i heard rumors that no, it was not. >> i never declared martial law. >> narrator: did the police believe they could suspend their n rules? >> ds hexpecus to rank and file, go through the streets, you know, shooting looters?fd-Ñç >> narrator: new evidence shows that an order was given authorizing officers to shoot looters. >> one of the most troubled police departments in the history of north america. the nopd reverts back to what the existing culture has always been. >> that's the gu