A file of evidence linked to the investigation into the "Plebgate" row has been passed to prosecutors, Scotland Yard said.
The information was given to the Crown Prosecution Service on Thursday afternoon for its consideration.
So far, three officers have been arrested as part of the investigation sparked by the row which led former Tory chief whip Andrew Mitchell to quit his Cabinet post following claims that he called officers "plebs''.
The row led former Tory chief whip Andrew Mitchell to quit the Cabinet
Those arrested include a 52-year-old from the Diplomatic Protection Group who was held on December 15 on suspicion of misconduct in public office and bailed until April.
Two 46-year-olds from the same command were held on January 31 and February 1 for allegedly passing information to the media and were bailed until May. All three remain suspended.
A 23-year-old man who does not work for the police was also arrested and bailed until May.
The plebgate row ignited when Mitchell was accused of a heated rant against officers as he left Downing Street on September 19.
Pressure intensified after The Daily Telegraph published a police log of the incident, which claimed he called officers "plebs'' and swore at them repeatedly.
He insisted he did not use the words attributed to him, and later said he was the victim of a deliberate attempt to "toxify'' the Tories and ruin his career.
An email from a civilian witness backing up the police account of events has also since been called into question.
Some 30 detectives have taken statements from all 800 officers in the DPG, which is tasked with protecting government officials.
Scotland Yard is currently trying to find out how the Sun and Daily Telegraph obtained information about the Plebgate row and if it came from police.
It is also looking at a police officer's claim to have witnessed the altercation between Mr Mitchell and officers in Downing Street, and allegations by Mitchell that police had lied in a log dated September 19 2012.
A CPS spokesman said: "We have received initial papers but we have not received a full file of evidence and we now await the conclusion of the police investigation before considering charges."