All three police officers were freed on bail after being charged.
One, a member of the Paris drugs squad, was charged with taking part in a drug-laundering operation, the second with taking part in a drug-laundering operation, drug-trafficking and abusing his authority by opening sealed material, the third with profiting from sealed material and drug-trafficking.
The 52 kilogrammes of cocaine were locked away under seal in the famous Paris police headquarters on the Quai des Orfèvres near Notre Dame Cathedral.
One of the first people to be charged, another drugs squad officer identified as Jonathan G, is reported to have been spotted carrying bags out of the room where the drugs had been locked away during the night of 24 July after having entered on a “flimsy pretext”.
The cocaine has never been found.
Investigators found that Jonathan G had property and assets out of proportion to his income and are trying to determine if other thefts had taken place.
His wife and brother, who is also a police officer, have also been charged.