As questions continue to surround the cause of Hulk Hogan’s death last month, Florida law enforcement sources are saying it may have been the result of medical malpractice.

Hogan’s 46-year-old widow, Sky Daily, confirmed to TMZ on Thursday that his phrenic nerve — which enables the lungs to inhale and exhale air — was “compromised” during a recent operation. Daily also confirmed that an autopsy has been performed, but declined to reveal its results.

Her remarks followed the outlet’s report that an occupational therapist who was at Hogan’s home when he stopped breathing told Clearwater police that a surgeon had “severed” Hogan’s phrenic nerve.

The therapist’s claims of medical malpractice were recorded by the officers who responded to the scene, though sources told TMZ the police report is on “lockdown.”

In a statement to the outlet on Thursday, Clearwater police confirmed the investigation into Hogan’s death is ongoing.

“The unique nature of this case has required us to interview multiple witnesses and seek medical records from a variety of providers, and our detectives continue to do that,” they said. “All of this takes time.”

Hogan was pronounced dead on July 24 in Clearwater, Florida, after medics were dispatched to his home in response to a cardiac arrest. The 71-year-old’s cause of death was later confirmed to be a heart attack, though documents obtained by Us Weekly also said he had a history of leukemia CLL.

The latter took estranged daughter Brooke by surprise, given her knowledge of his medical history. She said she had been present for almost all of her dad’s surgeries in previous years and reviewed his blood work each time, but was never given any indication he had cancer.

Like authorities, Brooke said there were “no signs of foul play or anything suspicious” about her father’s death. Still, she was calling for an autopsy to be performed so the family could be certain about Hulk’s “very complicated medical history.”

Earlier this month, Daily said the family was looking to answer “every question about his medical care” prior to him being cremated.

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