Prince who passed away at his compound in Minnesota last week was contracted HIV in mid-90s and condition developed into AIDS six months ago, media reported citing unidentified law enforcement sources.
He reportedly refused to get treatment because he thought 'God would heal him'.
Prince became an international sensation in the 1980s, when he popularised the Minneapolis sound of danceable funk. His 1984 album "Purple Rain" is often described as one of the greatest of all time.
Read More: Pop superstar Prince passes away at 57
According to CNN, prescription of opioid medication, commonly used to treat pain, has also been recovered by the authorities investigating the death of music legend Prince.