They actually robbed refugees at gunpoint:

 

Story

 

And when exhausted hurricane victims set up temporary shelters on the highway, Gretna police came back a few hours later, fired shots into the air again, told people to "get the f -- off the bridge" and used a helicopter to blow down all the makeshift shelters, the paramedics said.

 

When the officers had pushed the crowd back far enough, one of them took the group's food and water, dropped it in the trunk of a patrol car and drove away.

 

There seem to be a chief of police and another police officer who need to spend a few years in jail. Armed robbery under color of law with aggravating circumstances.

http://www.nytimes.com/2005/09/10/national/nationalspecial/10emt.html

 

Instead, a suburban police officer angrily ordered about 200 people to abandon an encampment between the highways near the bridge. The officer then confiscated their food and water, the four witnesses said. The incidents took place in the first days after the storm last week, they said.

Sounds pretty horrific.