Morrison, a former boxing champion, apparently died from respiratory and metabolic acidosis and multiple organ failure.
He died on Sept. 1 on a hospital bed in Nebraska.
Morrison was discovered to be HIV positive prior to a scheduled February 1996 bout with Arthur Weathers in Las Vegas, when he was just 27.
However, later in his life he denied having the illness. That wasn't even close to the end of the story, as Morrison took it a step further by questioning whether the disease existed at all.
According to that Aug. 23 ESPN story, Morrison was being kept alive with a feeding tube and a ventilator.
"He's too far gone," Morrison's mother told ESPN in the story. "He's in the end stages. That's it."
She said Morrison had been bedridden for a year, couldn't speak and was being kept alive with the help of a feeding tube and a ventilator.
"I talk to him on the phone," she said of Morrison. "I tell him that the family loves him, he's always in our prayers. What can you say to him? I don't tell him to keep fighting or nothing, because I want him to go."
Even until his final breath, Morrison didn't believe he had AIDS.
"He's been in denial ever since he's had it," Morrison's mother, Diana, said in the ESPN report. "So he's blown smoke up her rear end and got her believing."