Amber Hilberling, who was reportedly found hanging in her prison cell in October, had methamphetamine in her bloodstream at the time of her death, according to an autopsy report.
Rhonda Whitlock said her daughter wasn’t suicidal. “I don’t know if finally it just got to her and she snapped or if someone killed her,” she said.
Hilberling was serving 25 years in prison for pushing her husband, who then fell out a window in their apartment at the University Club Tower on June 7, 2011.
The civil suit names University Club Tower, Horizon Realty Management Inc. and Budget Glass Cleaning Inc. as defendants.
"I pushed him off me. The window wasn't supposed to happen," Hiberling said in an interview broadcast on Thursday.
Amber Hilberling, who is in prison for pushing her husband out of a 25th-floor apartment near downtown Tulsa, will appear on a Thursday episode of "Dr. Phil." Her mother blamed the family's "high profile" for creating a bias against her daughter.
Amber Hilberling's defense attorneys, April Seibert and Jasen Corns, had raised issues regarding the appropriateness of a murder charge and the lack of second-degree manslaughter as an alternative, as well as whether other factors compromised her right to a fair trial.