Timeline of key events in last 2 weeks of Prince’s life

In this April 21, 2016 file photo, people stand outside entertainer Prince’s Paisley Park compound in Chanhassen, Minn. A search warrant reveals that a Minnesota doctor saw Prince twice in the month before his death – including the day before he died – and prescribed him medication. The warrant says Dr. Michael Todd Schulenberg treated Prince on April 7 and April 20. Prince died April 21 at his Minnesota home. Jim Gehrz/Star Tribune via AP

MINNEAPOLIS — A Minnesota doctor saw Prince twice in the month before his death — including the day before he died — and prescribed him medication, according to contents of a search warrant. Authorities are investigating what killed the musician.

Some key events in the last two weeks of Prince’s life:

April 7 — Dr. Michael Schulenberg, a Minnesota primary care physician, sees Prince, according to the search warrant. Also, two Prince concerts in Atlanta are postponed. The artist said at the time he had fallen ill with the flu.

April 14 — Prince performs makeup concerts in Atlanta, apologizing to fans. He jokes about having been “under the weather,” giving a slight smile. His voice seems a bit weak at times while speaking, but sounds fine when singing during his 80-minute show.

April 15 — Prince falls ill on a flight home from Atlanta, and the plane makes an emergency stop in Moline, Illinois. A law enforcement official who spoke to the AP on condition of anonymity because he was not authorized to speak to the media said that Prince was found unconscious on the plane and that first responders gave him a shot of Narcan, an antidote used to reverse suspected opioid overdoses.

April 16 — Prince hosts a dance party at his Paisley Park complex and makes a brief appearance, showing off a new purple piano. “Wait a few days before you waste any prayers,” he tells fans.

April 20 — Prince is seen by Schulenberg again, according to the warrant. At some point, Schulenberg prescribed medications to Prince and ordered tests, according to the warrant, which does not specify what medications were prescribed or whether Prince took them.

READ: Investigators look at overdose in Prince death

April 20 — Dr. Howard Kornfeld, a California addiction specialist, is asked by Prince representatives to help the star, according to Kornfeld attorney William Mauzy. Kornfeld sends his son, a non-physician, on a red-eye flight to Minnesota, carrying a drug used to treat opiate addiction.

April 21 — Andrew Kornfeld and others find Prince unresponsive in an elevator at Paisley Park. Schulenberg arrived “on the death scene” at some point, according to the warrant. He tells a detective he was there to drop off test results, and that he had prescribed medications that were to be filled at a Walgreen’s pharmacy.

READ: Behind closed doors, lawyers dig into Prince’s estate