A former inspector has been referred to the police watchdog over claims he "acted on behalf" of Jimmy Savile by contacting officers before an interview.
The officer, who was from West Yorkshire Police, is accused of contacting Surrey Police before they questioned Savile over alleged sexual offences in 2009.
Prosecutors and police have already been criticised for missing the chance to bring the disgraced entertainer to court over the allegations before he died.
West Yorkshire was ordered by the Independent Police Complaints Commission (IPCC) to refer the officer.
Today the IPCC also said it has asked seven forces including West Yorkshire to review whether there are more conduct issues that should be referred to the watchdog over the Savile investigation.
The other six forces are Surrey, Sussex, Thames Valley, Greater Manchester, Lancashire and the Metropolitan police.