Prince's longtime lawyer has called the death of the superstar a complete shock, saying the singer lived a clean and healthy lifestyle, and disputing suggestions that he had a drug addiction.
Prince was found dead at his home in Paisley Park in Chanhassen, Minnesota, on Thursday. He was 57.
A post-mortem examination was carried out, but complete results will not be known for weeks.
Police said there was no indication of suicide.
Lawyer L Londell McMillan had known Prince for 25 years and at one time was his manager.
In a phone interview on Monday night, he told the Associated Press he spoke to Prince on the Sunday before he died and the singer said he was "perfect".
He also said Prince lived a clean lifestyle and was not "drugged up".