Pop star Prince performs during a tour stop in Denver at McNichols Arena July, 3, 1986. Toxicology results concluded that Prince died of opioid overdose.John Leyba, Denver Post file Related ArticlesMay 13, 2016 Colorado pays tribute to Prince at Red Rocks May 11, 2016 Colorado inmate claims Prince is his father, seeks DNA test The 57-year-old singer was found dead April 21 at his Minneapolis-area estate. The official, who is close to the investigation, spoke on condition of anonymity because he was not authorized to speak to the media. The findings confirm suspicions that opioids played a role in the musician’s death.