Police have previously said there was no evidence of foul play in Hogan’s death, so it’s not clear exactly what the police probe is looking into other than medical records. Hogan previously had leukemia and atrial fibrillation, an irregular heart rhythm, according to the medical examiner’s report that concluded the cause of death was natural.

An occupational therapist who was present at Hogan’s Clearwater, Fla. home when the WWE legend stopped breathing told cops on the scene that a surgeon “severed” his phrenic nerve during a recent surgery, according to the police report — which TMZ says is on “lockdown.”

It sounds like the cause of Hulk Hogan’s death is related to a surgeon severing the phrenic nerve that helps control breathing.