The investigation also delved into Dr. Michael Schulenberg, who had begun treating Prince on April 7, 2016 - just weeks before his death.
They don't reveal answers, but do shed light on Prince's struggle with addiction to prescription opioids in the days before he died. She said in a statement that Schulenberg "never directly prescribed opioids to Prince, nor did he ever prescribe opioids to any other person with the intent that they would be given to Prince".
A message left with Dr Schulenberg's lawyer was not returned, according to AP.
Bottles of opioid painkillers - some prescribed to Prince's former drummer and longtime friend Kirk Johnson - were found in several places in Paisley Park, and many medications were found in vitamin pill bottles and in envelopes, search warrants showed.
As for Dr. Schulenberg, he left his job at North Memorial Medical Center almost three weeks after Prince's death.
Authorities said Prince's laptop was not taken during an initial warrant but it became clear later in the investigation that items on it would be significant when they discovered he did not communicate by cellphone, but instead used email and the hard phone line at Paisley Park extensively. Authorities asked that the search warrants be sealed "until April 17, 2017 or when a criminal case may be instituted, whichever occurs first".
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One search warrant document reads, "During the search warrant of Prince's home, detectives located numerous narcotic controlled substance pills in various containers and areas of Prince's bedroom, some of which were in a suitcase with the nametag of "Peter Bravestrong".
According to an affidavit filed September 12, 2016, Carver County Sheriff's investigators and the DEA conducted a Minnesota Prescription Monitoring Program warrant. FILE - In this April 21, 2016, file photo, a rainbow appears over Prince's Paisley Park estate near a memorial for the rock superstar in Chanhassen, Minn.
Just six days earlier, Prince fell ill on a plane and made an emergency stop in IL as he was returning home from a concert in Atlanta. Kornfeld can not clear his schedule to fly to Minnesota immediately, so he sends his son, Andrew, on an overnight flight.
No one has been charged in connection with his death, but authorities say the investigation is still open and active. The goal was for the younger Kornfeld to help evaluate Prince's health and encourage him to enter treatment for pain management and potential addiction issues, attorney William Mauzy told reporters. He and five others were searching for Prince when Kornfeld said he heard a scream. Almost a year after his accidental overdose death at his suburban Minneapolis studio and estate, investigators still don't know how he got the fentanyl that killed him. Even so, nothing suggests they're any closer to determining where Prince obtained the fentanyl.
Patients who take prescription opioids eventually build up a tolerance and need to take stronger doses to get the same effect. He knew [he was going to die soon].
Police believe that was an alias Prince used when he travelled.