Warner was sentenced to 3 to 8 years for voluntary manslaughter.

A sentence after a guilty plea to voluntary manslaughter is the court's judgment. It is not a new finding of guilt. On Wednesday, Sept. 23, 2026, District Judge Michelle Leavitt sentenced Heidi Warner, 25, of Las Vegas, to 3 to 8 years in Nevada state prison. The defense asked for probation, the judge denied it, and Warner was taken into custody at sentencing.

Seneca Higley, 44, of the St. George, Utah area, was found dead on Feb. 26, 2024, in a Caesars Palace hotel room. The Las Vegas Review-Journal and the Nevada Globe reported that the death was ruled an overdose involving fentanyl, alcohol, and other substances, and that the fentanyl was in counterfeit blue pills marked "M 30." Investigators said Warner supplied the counterfeit pills, which were later confirmed to contain fentanyl. Those are the reported facts of the death. They are the record behind the plea. Wednesday's hearing imposed the sentence.

Warner had pleaded guilty to voluntary manslaughter. The original indictment included second-degree murder and controlled-substance charges. Under the plea, prosecutors stood silent and made no sentencing recommendation. The judgment entered in Clark County District Court is 3 to 8 years on the voluntary manslaughter count she admitted. Coverage of the Wednesday sentencing also carried a Sept. 24 date. Probation was denied, and she was taken into custody.