Prince's representatives had sought a meeting with a leading addiction specialist a day before the musician's death, according to the doctor's lawyer.
However, Dr Howard Kornfeld was unable to make it from California to Prince's home in Minnesota and instead sent his son, Andrew who is not a doctor,
According to the Kornfelds' lawyer, William Mauzy, it was Andrew who made the emergency call on April 21 after he and two members of Prince's staff found the musician unresponsive at his Paisley Park complex. The singer was declared dead a short time later.
Mr Mauzy said the plan was to stabilise the singer in Minnesota, before flying him to California to seek treatment at Dr Kornfeld's rehab centre.
He also said that Andrew was carrying a small amount of buprenorphine which is a treatment option for patients with addiction issues, but stressed that it was intended to give to a doctor in Minnesota who was scheduled to see Prince.
It emerged this week that emergency calls were made from the Paisley Park complex 46 times in the past five years, including one call in 2011 in which an unidentified woman said she was concerned about Prince's cocaine use, though no police action was taken.
An autopsy was carried out after the musician's death two weeks ago however the cause of death has not yet been released. It's understood that investigators are looking into whether Prince died from an overdose and if a doctor was prescribing him drugs prior to his death.