Feds seeking answers on how Prince got fentanyl, the opioid that killed him

Updated 12:15 PM EDT, Fri June 3, 2016
LOS ANGELES, CA - MARCH 02:  Musician Prince accepts the award for "Outstanding Male Artist" onstage during the 38th annual NAACP Image Awards held at the Shrine Auditorium on March 2, 2007 in Los Angeles, California.  (Photo by Vince Bucci/Getty Images)
PHOTO: Vince Bucci/Getty Images North America/Getty Images
LOS ANGELES, CA - MARCH 02: Musician Prince accepts the award for "Outstanding Male Artist" onstage during the 38th annual NAACP Image Awards held at the Shrine Auditorium on March 2, 2007 in Los Angeles, California. (Photo by Vince Bucci/Getty Images)
Now playing
01:27
Report: Fentanyl killed Prince
PHOTO: Prince/YouTube
Now playing
00:48
Watch never-before-seen footage of Prince
prince presser
PHOTO: cnn
prince presser
Now playing
01:17
Attorney: No criminal charges in Prince death
NEW YORK, UNITED STATES:  Inductee Prince performs a song of George Harrison along with Tom Petty after the late Beatle was inducted during the 19th Annual Rock and Roll Hall of Fame Induction Ceremony 15 March 2004 in New York City. AFP PHOTO   Timothy A. CLARY  (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
PHOTO: TIMOTHY A. CLARY/AFP/AFP/Getty Images
NEW YORK, UNITED STATES: Inductee Prince performs a song of George Harrison along with Tom Petty after the late Beatle was inducted during the 19th Annual Rock and Roll Hall of Fame Induction Ceremony 15 March 2004 in New York City. AFP PHOTO Timothy A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
Now playing
00:48
Is this Prince's greatest guitar solo?
UNSPECIFIED - JANUARY 01:  Photo of PRINCE; Prince performing on stage, silhouette  (Photo by Rico D'Rozario/Redferns)
PHOTO: Rico D'Rozario/Redferns/getty images
UNSPECIFIED - JANUARY 01: Photo of PRINCE; Prince performing on stage, silhouette (Photo by Rico D'Rozario/Redferns)
Now playing
03:36
Timeline of Prince's last days
family feud prince estate dnt todd tsr _00012510.jpg
family feud prince estate dnt todd tsr _00012510.jpg
Now playing
02:11
Prince's family in dispute over $300 million estate
NEW YORK, NY - FEBRUARY 07:  (Exclusive Coverage) Prince performs during his "Welcome 2 America" tour at Madison Square Garden on February 7, 2011 in New York City.  (Photo by Kevin Mazur/WireImage) *** Local Caption *** Prince
PHOTO: Kevin Mazur/WireImage/getty images
NEW YORK, NY - FEBRUARY 07: (Exclusive Coverage) Prince performs during his "Welcome 2 America" tour at Madison Square Garden on February 7, 2011 in New York City. (Photo by Kevin Mazur/WireImage) *** Local Caption *** Prince
Now playing
01:39
Drug expert sent to Prince on 'life-saving mission'
LAS VEGAS, NV - SEPTEMBER 22:  Recording artist Prince performs with singer Mary J. Blige onstage during the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 22, 2012 in Las Vegas, Nevada.  (Photo by Isaac Brekken/Getty Images for Clear Channel)
PHOTO: Isaac Brekken/Getty Images North America/Getty Images for Clear Channel
LAS VEGAS, NV - SEPTEMBER 22: Recording artist Prince performs with singer Mary J. Blige onstage during the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 22, 2012 in Las Vegas, Nevada. (Photo by Isaac Brekken/Getty Images for Clear Channel)
Now playing
00:47
Prince investigators look for source of opioids
PASADENA, CA - JUNE 01:  Singer Prince performs onstage during the 2007 NCLR ALMA Awards held at the Pasadena Civic Auditorium on June 1, 2007 in Pasadena, California.  (Photo by Kevin Winter/Getty Images for NCLR)
PHOTO: Kevin Winter/Getty Images North America
PASADENA, CA - JUNE 01: Singer Prince performs onstage during the 2007 NCLR ALMA Awards held at the Pasadena Civic Auditorium on June 1, 2007 in Pasadena, California. (Photo by Kevin Winter/Getty Images for NCLR)
Now playing
02:42
Prince's bodyguard: He wasn't taking drugs
prince plane emergency landing faa audio legal view_00001520.jpg
PHOTO: Getty Images
prince plane emergency landing faa audio legal view_00001520.jpg
Now playing
02:50
New clue in the death of Prince
PHOTO: Getty Images/Kenneth Fowler/CNN
Now playing
02:27
The Prince the public never knew
Prince performs in Hong Kong on October 17, 2003. Prince's concert was the the opening act in a four-week government-sponsored music festival titled "Hong Kong Harbor Fest,"  aimed at boosting the image of SARS-battered Hong Kong.
PHOTO: ANAT GIVON/AP
Prince performs in Hong Kong on October 17, 2003. Prince's concert was the the opening act in a four-week government-sponsored music festival titled "Hong Kong Harbor Fest," aimed at boosting the image of SARS-battered Hong Kong.
Now playing
01:59
A tribute fit for a Prince
cartoonian prince parental advisory pkg sotu_00001208.jpg
cartoonian prince parental advisory pkg sotu_00001208.jpg
Now playing
01:55
Prince's lasting political legacy
NEW YORK - MARCH 15:  Inductee Prince performs following George Harrison's induction at the Rock & Roll Hall Of Fame 19th Annual Induction Dinner at the Waldorf Astoria Hotel March 15, 2004 in New York City.  (Photo by Frank Micelotta/Getty Images)
PHOTO: Frank Micelotta/Getty Images North America/Getty Images
NEW YORK - MARCH 15: Inductee Prince performs following George Harrison's induction at the Rock & Roll Hall Of Fame 19th Annual Induction Dinner at the Waldorf Astoria Hotel March 15, 2004 in New York City. (Photo by Frank Micelotta/Getty Images)
Now playing
00:46
Publicist: Prince's remains have been cremated
prince plane emergency landing faa audio legal view_00001520.jpg
PHOTO: Getty Images
prince plane emergency landing faa audio legal view_00001520.jpg
Now playing
02:07
FAA audio released in Prince's emergency landing
PHOTO: FROM WARNER BROS.
Now playing
01:38
Prince's most memorable songs
pince nelson rogers lkl 1999 name change sot_00000402.jpg
PHOTO: CNN
pince nelson rogers lkl 1999 name change sot_00000402.jpg
Now playing
01:13
Prince explains his name change (1999 interview)
prince rogers nelson lkl 1999 name change sot_00000810.jpg
PHOTO: CNN
prince rogers nelson lkl 1999 name change sot_00000810.jpg
Now playing
00:59
How Prince describes his music (1999 interview)
prince love interests wives kaye pkg ac360_00035119.jpg
PHOTO: Getty Images
prince love interests wives kaye pkg ac360_00035119.jpg
Now playing
03:52
Prince's epic love life
NEW YORK, NY - FEBRUARY 07:  (Exclusive Coverage) Prince performs during his "Welcome 2 America" tour at Madison Square Garden on February 7, 2011 in New York City.  (Photo by Kevin Mazur/WireImage) *** Local Caption *** Prince
PHOTO: Kevin Mazur/WireImage/getty images
NEW YORK, NY - FEBRUARY 07: (Exclusive Coverage) Prince performs during his "Welcome 2 America" tour at Madison Square Garden on February 7, 2011 in New York City. (Photo by Kevin Mazur/WireImage) *** Local Caption *** Prince
Now playing
00:54
Prince's most iconic looks
PHOTO: Kevin Mazur / Contributor
Now playing
01:07
Superstar Prince dies at 57
PASADENA, CA - JUNE 01:  Singer Prince performs onstage during the 2007 NCLR ALMA Awards held at the Pasadena Civic Auditorium on June 1, 2007 in Pasadena, California.  (Photo by Kevin Winter/Getty Images for NCLR)
PHOTO: Kevin Winter/Getty Images North America
PASADENA, CA - JUNE 01: Singer Prince performs onstage during the 2007 NCLR ALMA Awards held at the Pasadena Civic Auditorium on June 1, 2007 in Pasadena, California. (Photo by Kevin Winter/Getty Images for NCLR)
Now playing
01:01
Songs you didn't know Prince wrote
PHOTO: Frank Micelotta/Getty Images/Kevork Djansezian/AP
Now playing
02:25
Pop legend Prince dead at 57

Story highlights

Prince, 57, died in his Minnesota home in April

It's unclear how he got the opioids

Federal officials are seeking answers on where the fentanyl came from

(CNN) —  

A medical examination has concluded that Prince died of an accidental overdose of pain medication, ending weeks of speculation on how the singer died.

But it also raises a new question: How did he get his hands on the drug?

The medicine, fentanyl, is an opioid and is one of the strongest painkillers available. It’s prescribed for cancer treatment, but it’s also being made illicitly and sold on the streets, delivering a super high and, far too often, death.

Prince, who had a reputation for clean living, had long suffered from bad hip – and some who knew him said he had been addicted to pain meds for some time.

The entertainer was found with opioid medication at the time of his death, according to a law enforcement source. And the day before he died, his team called an eminent opioid addiction specialist in California seeking urgent help for the singer, the doctor’s lawyer had said earlier.

The man who found Prince

If the fentanyl was prescribed by a doctor, who got it for Prince?

If it turns out he obtained it illegally, then the singer’s death investigation will turn into a criminal one.

Little details in the report

The Midwest Medical Examiner’s office conducted the autopsy and released a copy of its findings Thursday. And although the report reveals some things, it doesn’t provide much detail.

Under “how injury occurred,” the report said “the decedent self-administered fentanyl.” For manner of death, a box was marked for “accident.”

In other words: Prince’s accidentally overdosed after giving himself fentanyl.

The 57-year-old musician was found unresponsive in an elevator at his home and recording studio in Chanhassen, Minnesota, on April 21.

The report said Prince, who was 5 feet 3 inches, weighed 112 pounds. He was dressed in black that morning, including a black cap.

Opioids and overdoses: 4 things to know

Spotlight on a potent drug

The report once again shines a spotlight on fentanyl, a drug that medical experts call the new heroin, but deadlier.

It’s been around since the 1960s. And its potency works miracles, soothing extreme pain.

The drug is 25 to 50 times more potent than heroin and 50 to 100 times more potent than morphine.

An illicit version of the drug is flooding into communities nationwide, with the Drug Enforcement Administration describing it as a health crisis.

Another heartbreaking turn

The report also marks another heartbreaking turn for Prince fans who haven’t stopped mourning since his death.

Some spoke of their dismay, while other expressed frustration that more information about the singer’s death had not yet been released.

“I can’t help but think there is more to it,” one person wrote in the online fan community, Prince.org. “I just wish instead of letting the results trickle out they would just release it all at once. It’s heartbreaking as it is!”

A fan tweeted Thursday “#Prince passed on of #ChronicPain essentially. Anyone that has been in chronic debilitating agony knows what that feels like.”

CNN’s Ralph Ellis and Lisa France contributed to this report