Five police officers are being investigated for misconduct by the Independent Office for Police Conduct over stopping Team GB athlete Bianca Williams in a car in Maida Vale, the Metropolitan Police said.
A video of the incident, which saw the Great Britain sprinter and her partner Ricardo dos Santos pulled from their car in July, was posted online.
The car was searched and nothing was found. No arrests were made.
The Independent Office for Police Conduct said it had advised five Met officers they are subject to a misconduct investigation.
The watchdog said the officers will be investigated for potential breaches of police standards of professional behaviour relating to use of force, duties and responsibilities, and authority, respect and courtesy.
Footage of the incident in Maida Vale on 4 July was shared widely on Twitter at the time after being posted by former Olympic medallist Linford Christie.
Williams made a complaint about the incident on Twitter and the Met made a referral to the IOPC, the watchdog said.
IOPC regional director Sal Naseem said: “Having analysed a range of evidence including police body worn, dashcam video and witness statements, we now have a fuller picture of the officers’ interactions with the couple and their child.
“As a result, we have taken the decision that this meets the threshold for a misconduct investigation, the allegations will now be investigated thoroughly and independently.
“It is important to note that a misconduct investigation does not necessarily mean misconduct proceedings will follow. Decisions on any further action will only be made once our investigation is complete.”