The deputy mayor for policing in London is being investigated by the police watchdog over allegations linked to a previous job.
A spokeswoman for the Independent Police Complaints Commission (IPCC) said the body received the referral about Stephen Greenhalgh yesterday from the Greater London Authority (GLA).
She said: "This referral follows a complaint made to the GLA regarding the conduct of deputy mayor for policing Stephen Greenhalgh.
"The allegations which form the complaint relate to Mr Greenhalgh's previous role at a London local authority. The complaint is currently being considered by the IPCC."
Mr Greenhalgh's current role means he has the authority to appoint and sack senior officers in the capital.
Deputy Mayor Stephen Greenhalgh says often people only go to police stations to hand in lost property, so Post Offices could provide a solution in providing police services, while cutting costs.
Boris Johnson's Deputy Mayor for Policing Stephen Greenhalgh has made his first public appearance in front of the London Assembly, since being warned over claims that he acted "inappropriately" towards a female colleague.
Ronke Phillips reports.
London's Deputy Mayor for Policing Stephen Greenhalgh has issued an apology after he was accused of behaving inappropriately to a female employee in a City Hall lift. Mr Greenhalgh said he was not admitting he was guilty but was apologising for the distress that the incident had caused.
A Greater London Authority monitoring officer has interviewed the employee but decided not to take action against Mr Greenhalgh as there was no conclusive evidence. However, Mayor Boris Johnson said he had spoken to his deputy about inappropriate conduct in City Hall.
One of the Mayor's deputies issued an apology today for apparently acting 'inappropriately' towards a female colleague.
She claimed that Stephen Greenhalgh - the Deputy Mayor for Policing - touched her in a lift.Boris Johnson has, in the last half an hour, issued an 'immediate review'.
Our Political Correspondent Simon Harris has the story.
Mayor Boris Johnsons's policing chief has apologised after claims he inappropriately touched a female City Hall worker in lift.