The 82-year-old man arrested on suspicion of sexual offences by officers from Operation Yewtree was interviewed under caution on November 29 last year, five days after a search warrant was executed at an address in Berkshire.
He has been bailed to a date in May pending further inquiries.
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Officials also looking at whether doctor was with the pop star on a plane that made an emergency landing less than a week before he died.
Two ambulances crashed leaving one driver dead and three people seriously injured.