The Volusia County Sheriff's Office in Florida identified recently found human remains as 16-year-old Autumn McClure. (Universal Images Group via Getty Images)

"She came home one afternoon and saw Brian choking Autumn in the bathroom," Sheriff Mike Chitwood said. "By the time she intervened, she saw that Autumn was lifeless, and she left" the trailer. Freeman told investigators that Donley threatened to kill her if she ever said anything about McClure’s murder. 

Freeman is not a suspect. 

In the 20 years since McClure disappeared, the property the trailer sat on changed hands several times, and a new trailer was placed there in 2021.

The sheriff’s office was able to have the trailer removed, along with the concrete it sat on, to allow for the excavation of the property last week. 

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Chitwood added that although Donley won’t face justice in this life, "I’m hoping to God that when he took his last breath on May 26 of 2022, that maybe he had a vision of where the hell he was headed."

Fox News' Greg Wehner contributed to this report. 

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