Newly released court documents related to the investigation into Prince’s death reveal he hid some opioid pills in over-the-counter vitamin and aspirin bottles.

The New York Times reports that in at least one instance, Prince procured an opioid prescription in the name of a personal friend and employee.

Prince was found dead in his home in April 2016, after he ingested a fatal amount of fentanyl, an opioid often used to make counterfeit pills that are sold illegally as oxycodone and other pain relievers.

Prince reportedly suffered hip pain after decades of strenuous performances. He regularly jumped onstage in platform heels. He began taking painkillers for his hip pain years ago, and had hip surgery in the mid-2000s. He was then prescribed more pain medicine.