In a YouTube video, he said the animals were "boiling alive in a towering inferno" in the fire that occurred on March 26 sometime between 2:30 and 4:30 am, reported the Los Angeles Times.
The exotic pets once belonged to the late musician and were taken from Neverland Ranch in Santa Barbara County after it closed.
Garvin County Sheriff Larry Rhodes told the Oklahoman that deputies suspect arson because the park received a threat before the fire. He said the state's fire marshal and the FBI were investigating the blaze.
People for the Ethical Treatment of Animals has said the park is a "poorly run facility".
