Sounds like what they are covering up is nothing less than murder.
On TV the other day a show had the 5 year Katrina look back. They focused on a police officer beating a couple of dudes who brought a shooting victim to the station. Turn out the shooting victim was shot by police earlier. An officer jumped in the car of the wounded victim and drove off. Later the car was found burned out with the victim inside.
“Law enforcers” have a long history of burying their mistakes.