An unidentified Minnesota man has come forward, claiming to be the secret son of pop star Prince. 
 
 John Hilbert and Shar Mansukhani are the owners of Heir Hunters International, a Los Angeles firm that searches for heirs to estates. 
 
 “We had an individual call us, he was raised in the Midwest (and he) had a very credible story,” said Hilbert. 
 
 Read: World is Bathed in Purple for Prince As His Sister Says: Thank You For Loving Him 
 
 According to the company owners, the man is in his 30s, lives in Prince’s home state and says he was born after his mother had a fling with the singer in the 1980s. 
 
 “He does not want any publicity. He said ‘Would you please tell me the procedure for proving my paternity. I have no interest in having a press conference,’" Hilbert told IE. 
 
 Prince was found dead in an elevator at his Paisley Park compound on April 21. 
 
 Read: Prince's Remains Have Already Been Cremated in Small Private Ceremony 
 
 Prince’s sister, Tyka Nelson, and four of his five half-siblings are trying to sort his estimated $300 million estate. Nelson has asked for a court-appointed executor to oversee the musician’s fortune, saying he died without having filed a will. 
 
 The man claiming to be Prince’s son has asked to take a DNA test, according to Hilbert and Mansukhani. 
 
 Watch: Why Police Were Called 46 Times to Prince's Paisley Park In The Last 5 Years 

 Prince was found dead one day before he was scheduled to meet with a California doctor in an attempt to kick an addiction to painkillers, an attorney with knowledge of the death investigation said Tuesday. 
 
 Dr. Howard Kornfeld, a national authority on opioid addiction treatment, was called by Prince representatives the night of April 20 because Prince “was dealing with a grave medical emergency,” said William Mauzy, a prominent Minneapolis attorney working with the Kornfeld family. 
 
 Kornfeld, who runs Recovery Without Walls in Mill Valley, Calif., could not clear his schedule to meet with Prince the next day, April 21, but he planned to fly out the following day. 
 
 So he sent his son, Andrew Kornfeld, who works with him, to Minnesota, with plans for him to go to Paisley Park to explain how the confidential treatment would work, Mauzy said. 
 
 “The plan was to quickly evaluate his health and devise a treatment plan,” Mauzy said, speaking on behalf of the Kornfelds. “… The doctor was planning on a lifesaving mission.” 
 
 Several other sources with direct knowledge of the investigation confirmed Mauzy’s account. Calls and e-mails to the Kornfelds were not returned Tuesday evening. 
 
 Crowds continued to make the pilgrimage to Paisley Park on Monday to honor Prince. 
 
 Andrew Kornfeld was expected to meet with Prince early Thursday after taking a red-eye flight from San Francisco the night Prince’s representatives called, Mauzy said. 
 
 When Andrew Kornfeld arrived at Paisley Park at 9:30 a.m. Thursday, Prince’s representatives could not find him, Mauzy said. Andrew Kornfeld was one of three people at Paisley Park when the musician’s body was found in an elevator a few minutes later — and it was Andrew Kornfeld who called 911. 
 
 Mauzy said that Andrew Kornfeld told him that the others “screamed” when they found Prince and “were in too much shock” to call 911. 
 
 Unfamiliar with Paisley Park, Andrew Kornfeld simply told the dispatcher, “We’re at Prince’s house.” 
 
 Asked again to give an address, he said simply: “The people are just distraught. … We’re in Minneapolis, Minnesota, and we are at the home of Prince.” 
 
 Emergency responders arrived within five minutes. Prince was pronounced dead at 10:07 a.m., 19 minutes after responders arrived. 
 
 Authorities said Prince was alone when his body was found. Foul play and suicide are not suspected. Autopsy results, which will include toxicology tests, are pending. 
 
 Within days of Prince’s death, sources told the Star Tribune that his use of painkillers, which were found at the scene, had become the focus of the investigation. As part of their probe, investigators are trying to determine where Prince got the pills and who provided them. 
 
 While authorities have characterized their work as a criminal investigation, that doesn’t mean that it will result in charges. 
 
 After he was first contacted by Prince’s representatives, Howard Kornfeld requested that a Twin Cities physician check on Prince and stabilize him, sources said. 
 
 It was hoped that Prince would agree to go to California for long-term care under Kornfeld’s supervision, which would include round-the-clock nursing support, Mauzy said. 
 
 Prince’s representatives called Howard Kornfeld because of his reputation as a nationally known addiction researcher, Mauzy said. 
 
 According to Howard Kornfeld’s business website, Recovery Without Walls is a “personalized outpatient clinic, specializing in innovative, evidence-based medical treatment for chronic pain and drug and alcohol addiction.” It says that the clinic’s medical team “works together to resolve problems that other clinicians have found difficult, if not impossible to solve.” 
 
 Howard Kornfeld also is known as an advocate for the expanded use of Suboxone, which contains buprenorphine and curbs opioid cravings. The drug has been underutilized, in part, because many doctors haven’t completed the federal training that is necessary to prescribe it. 
 
 Andrew Kornfeld had a small amount of buprenorphine to give to Prince. However, it was never administered, Mauzy said. 
 
 He added that Andrew Kornfeld gave the medication to Carver County investigators, who later interviewed him and the two others — whom Mauzy identified only as Prince staffers — who were at Paisley Park when the body was found. 
 
 Attorney William Mauzy answers questions from the media as he arrives at his Minneapolis office Wednesday, May 4, 2016. 
 
 Six days before Prince was found dead, his private plane was returning to Minneapolis after two concerts in Atlanta when it made an emergency landing in Moline, Ill. Sources with direct knowledge of the investigation have said that the landing occurred because Prince was overdosing on opioids. 
 
 Prince’s bodyguard carried him to waiting paramedics at the airport and he was given a shot of the opioid antidote Narcan. He was taken to a hospital, but left within a few hours against medical advice. 
 
 Carver County Chief Deputy Jason Kamerud declined to comment Tuesday about the investigation. 
 
 Tyka Nelson, Prince’s sister, who in recent days has led the appointment of a special administrator to oversee his estate, also declined to discuss her brother’s death Tuesday. 
 
 “I have nothing to say,” she said. 
 
 Staff writers Dan Browning, Jeremy Olson and Emma Nelson contributed to this report.
– Dr. Howard Kornfeld, a nationally recognized specialist in opioid addiction, received a call on April 20 about a man suffering from a "grave" addiction to painkillers. The California doctor sent his son on a red-eye flight to see the patient in Minnesota and explain how his father's "lifesaving mission" would work until Kornfeld could depart on April 22, lawyer William Mauzy tells the Minneapolis Star Tribune. But within minutes of the younger Kornfeld's arrival at Paisley Park at 9:30am, the patient—Prince—was found unconscious in an elevator, says Mauzy, who is working with the Kornfeld family. It was Andrew Kornfeld who called 911, he adds. "The people are just distraught," Kornfeld said in the call. "We're in Minneapolis, Minnesota, and we are at the home of Prince." Mauzy says Prince's reps called Dr. Kornfeld because of his reputation as one of the best opioid addiction specialists in the country. The medical team at his rehab clinic "works together to resolve problems that other clinicians have found difficult, if not impossible to solve," according to its website. His plan "was to quickly evaluate his health and devise a treatment plan" that would involve Prince attending rehab under Kornfeld's supervision, says Mauzy. Andrew Kornfeld was even carrying buprenorphine, which helps opioid addicts go through withdrawals, Mauzy says. Sources say painkillers were found at Prince's home and are the focus of the investigation into his death, per the Tribune. Police are examining how Prince got the pills. (Did Prince have a secret son?)