FILE - In this May 19, 2013 file photo, Prince performs at the Billboard Music Awards at the MGM Grand Garden Arena in Las Vegas. Mariah Brown, a former assistant to Prince until last year, has spent the days since his death trying to figure out how her boss, could have died so suddenly, adding that she never saw the singer ingest any substances during her employ. Prince was found dead at his home on April 21, 2016, in suburban Minneapolis. He was 57 (Photo by Chris Pizzello/Invision/AP, File)

Warrant: Minnesota doctor saw Prince, prescribed drugs

A Minnesota doctor saw Prince twice in the month before his death, including the day before he died, and prescribed him medication, a search…