() The former owner of the NFL’s Indianapolis Colts, Jim Irsay, relapsed multiple times before his death in May and hid it from the public, according to a recently published Washington Post investigation.

Irsay dealt with addiction publicly throughout his life, but seemed to have turned a corner in recent years, creating a charity known as Kicking the Stigma to promote mental health awareness and address stereotypes surrounding addiction.

Despite how it appeared on the outside, however, Irsay was still struggling in private, the Post reports.

Irsay overdosed three times in the last five years of his life, all of which were kept hidden from the public by Colts executives over fears it could jeopardize his job and standing with the league, according to the Post.

Harry Haroutunian, a recovery doctor, was reportedly prescribing Irsay hundreds of opioid pills and ketamine in the lead up to his death.

Irsay passed away on May 21 at the age of 65. His death certificate listed the cause of death as cardiac arrest caused by acute pneumonia and heart issues, according to the Post.

Haroutunian, who was with Irsay at the time of his death, signed the death certificate. No autopsy or toxicology report was conducted, leading some to question the accuracy of Irsay’s reported cause of death.

“I dedicated 18 months of my life to try to care for him … as a brother,” Haroutunian told the post. “We did everything we could to make him as comfortable as possible.”

The Post interviewed five people who knew about Irsay’s relapse, and they all expressed concern over the treatment he received from the recovery doctor. Everyone who was interviewed reported observing Irsay consume opioid pills, and four claimed they saw him receive ketamine injection

Irsay’s three daughters, Carlie Irsay-Gordon, Casey Foyt and Kalen Jackson, assumed primary ownership of the Colts following the death of their father.

“Our focus remains on honoring our Dad’s legacy, his decades of philanthropy, his loyalty to the Colts and its fans, and his passion for mental health advocacy, music, and second chances,” the daughters wrote in a statement to the post.