The police set up a money laundering operation to service the South Florida drug industry. Whether there was, initially, some noble law enforcement intent is debatable. Whatever, the officers quickly realized the money was big and sweet and the only way to fuck things up was to actually arrest anybody.
In two years, they cleaned up over $55 million in illegal cash for the cartels. The police departments officially pocketed $2.4 million in profits. The individual officers seem to have skimmed another $1.3 million dollars for their personal use. Other reports say up to $12 million is missing. During that time absolutely no arrests were made and many of the businesses the police laundered for are still in operation.
The Feds slapped Bal Harbour for using the laundered money to pay police salaries but ignored the greater operation until the Miami-Herald last year blew the cover off the whole sorted mess. With the enterprise known publicly, the Feds must now at least appear to be investigating. Some people have and will be fired but I suspect no one will be indicted.
Bless your naive little heart if you believe this is one, isolated, rogue police department. Until the affair became public, the Department of Justice's only concern about the illegal activities was some sloppy bookkeeping. This type of operation is so pervasive the DOJ is mostly interested in getting their cut. Stopping it would be a career killer for any FBI agent who tries.