Prince may have been dead for more than six hours before he was found as details surrounding his last days emerge 

Prince appeared to have been dead for more than six hours before he was found in an elevator at his Paisley Park estate, the Star Tribune reported.

Emerging details surrounding the iconic musician's last day suggest several desperate attempts were made to save Prince amidst a 'medical emergency'. Autopsy reports determining the cause of death are still pending.

A staff member reportedly called his former manager for advice on April 20 as his health declined following an overdose five days before, a source told the Tribune.

She enlisted the help of opioid addiction specialist Dr. Howard Kornfeld less than 12 hours before his death, according to the Tribune.

Prince also received intravenous treatment at a local hospital and saw a physician at Paisley Park the day before he died, sources told the Tribune.

Previous photos also showed the singer 'frail and nervous' outside Walgreens around 7pm that day.

Kornfeld's son took a red-eye flight and arrived at the Chanhassen, Minnesota estate for a preliminary evaluation only to call 911 at 9.43am on April 21 when Prince's body was found, sources said.

A staff member reached out to Prince's former manager, who called Howard Kornfeld (left), an opioid addiction specialist. He sent his son Andrew (right), who took a red-eye flight from California to Paisley Park

Prince was found unresponsive in an elevator inside Paisley Park (pictured) at 9.43am on April 21. One responding medic said Prince appeared to have been dead for more than six hours

Emerging details surrounding the iconic musician's last day suggest several desperate attempts were made to save Prince amidst a 'medical emergency'

A staff member reached out to Prince's former manager Phaedra Ellis-Lamkins in New York at 6am on April 20, the day before he died, a source told the Tribune.

Ellis-Lamkins, an activist known as 'the Robin Hood of Silicon Valley', worked with Prince on legal, business and financial issues, including his fight with Warner Brothers to win the rights to his musical masters.

She was the one who contacted Dr. Howard Kornfeld less than 12 hours before Prince's death, the Tribune reported.

Kornfeld, a leading opioid addiction specialist who operates an outpatient medical center in Marin County, California, is known for his work with buprenorphine.

The drug is said to help addicted patients by offering pain relief with less possibility of overdose and addiction, unlike oxycodone or morphine.

In an email to the Tribune, Ellis-Lamkins wrote: 'I cared deeply about him, and I am not ready to speak publicly. I also know how much he valued his privacy and want to respect his wishes.'

The same day, Prince received an intravenous treatment at a local hospital, and physician Dr. Michael Todd Schulenberg, who had been treating him for withdrawal symptoms, made a house call at Paisley Park, sources told the Tribune. 

Schulenberg also treated Prince earlier on April 7, and he prescribed medications for the musician, according to a search warrant. He told a detective the prescription was to be filled at a Walgreens.

The warrant did not specify what medications were prescribed or whether Prince took them.  

The day before his death, Prince received an IV treatment at a local hospital, and was pictured outside a Walgreens. A physician also made a house call at Paisley Park the same day. (pictured, staff at his memorial on May 15, 2016)

The 57-year-old music icon was seen at a Walgreens pharmacy around 7pm the same day looking 'frail and nervous'. It was his fourth visit to the pharmacy that week.

It is unknown why he went to the store or whether he picked up a prescription since anyone with Prince's phone number and address could have retrieved medication for him according to Walgreens' policies.

Kornfeld's lawyer William Mauzy said his client sent his son Andrew Kornfeld, a medical student and consultant for his father, because he couldn't immediately fly to Minnesota.

Meron Bekure (pictured) was one of three people who reportedly found him in the elevator

Andrew flew to see the star on a red-eye flight from California.

'The plan was to quickly evaluate his health and devise a treatment plan. The doctor was planning on a lifesaving mission,' Mauzy said. 

He said Howard was notified the singer was 'dealing with a grave medical emergency.'

Andrew arrived on the morning of April 21, and found the singer unresponsive alongside two of Prince's staff - Kirk Johnson, a long-time friend, and Meron Bekure, Prince's assistant.

Andrew was the one who called 911, and a responding paramedic reportedly told police Prince appeared to have been dead for at least six hours.  

Mauzy said that Andrew had carried with him a small quantity of buprenorphine, a drug used to treat addiction, that was intended for a local doctor to administer to Prince.

Kornfeld neither gave medicine to Prince nor saw him conscious, the lawyer said. 

Schulenberg told a detective that he was dropping off some results of tests that had been performed on Prince when he came upon the death scene after paramedics already arrived, according to the warrant.   

Fans who attended Prince's last concert in Atlanta, Georgia on April 14 say the Purple Rain hitmaker gave an incredible 80-minute performance with four encores, with no indication anything was wrong.

He apologized for postponing the show, which had been scheduled for the week before, because he had the flu. 

He left Georgia on a private jet around 11pm, and was only in the air for around two hours before making the unscheduled stop at Moline, Illinois at 1am.

He again brushed off his illness as the flu, inviting fans afterward to Paisley Park for a dance party, but the Star Tribune quoted anonymous sources as saying that the star had overdosed on opioids, which are generally used to treat severe pain.

Prince went through a hip replacement surgery in 2010, said to be brought on by his vigorous shows, which he often performed in high heels. 

Former manager Phaedra Ellis-Lamkins is said to have been involved in getting the singer help, although she told the Star Tribune she was 'not ready to speak publicly'

An attorney said that Andrew Kornfeld had carried with him a small quantity of buprenorphine, that was intended for a local doctor to administer to Prince

The drug is said to help addicted patients by offering pain relief with less possibility of overdose and addiction, unlike oxycodone or morphine