February 9, 2010 12:32

Introduction to Law & Disorder

A mysterious photo of a man lying motionless on the ground, in a bloodied shirt, surrounded by cops... Is he dead?

Human remains found in the burned shell of a car by the Mississippi River ... Did New Orleans police set the fire to cover up evidence of a killing?

A man is shot and killed by a police officer. Why did it take four years for the family to find out?

It's been nearly five years since Hurricane Katrina devastated New Orleans, still many questions are left unanswered in its aftermath. FRONTLINE, ProPublica and the New Orleans Times-Picayune have teamed up in a unique investigative collaboration to try and find some answers.

We're taking a fresh look at six cases of violent encounters between police and civilians in the days after the levees broke. Federal investigators also are looking into a number of these cases. We have five reporters on the beat, and our investigation will continue to unfold online in the coming months, with documents, text and video updates as we learn more.

But we want your help -- if you have any knowledge of these cases, call our tip line [504-826-3775], or e-mail us.