An Illinois Woman Killed Her Boyfriend’s Parents in Illinois. Then, She Drove to Colorado and Checked Herself Into a Mental Health Facility.

An Illinois woman recently was sentenced to 55 years in prison after pleading guilty, but mentally ill, to killing her boyfriend’s parents three years ago.

In October 2023, Arin Fox, 42, reached a plea agreement and admitted to the 2020 stabbing deaths of Noreen and Leonard Gilard in their Algonquin home, WBBM-TV reported.

On Dec. 7, a judge sentenced Fox to 55 years in prison after testimony and evidence was presented in court about the crime and the victim’s background, officials said.

Fox had been living with the elderly victims as their caretaker when the murders occurred on Nov. 6, 2020. Officials said Noreen Gilard was bedridden at the time of her murder.

After committing the murders, Fox reportedly packed up her belongings, stole money from the victims and drove their vehicle to Littleton, Colorado, according to the McHenry County State’s Attorney’s Office.

On Nov. 7, 2020, Fox checked herself into a psychiatric facility and told a nurse she had harmed the victims, authorities said.

Police conducting a welfare check on the victims discovered their bodies.

In October 2021, Fox was extradited back to Illinois and found incompetent to stand trial. However, in June 2022, she was deemed restored to fitness to stand trial, prosecutors said.

During the sentencing hearing, evidence showed forensic experts found Fox knew her actions were wrong and she was legally sane at the time of the murders. They also said Fox harbored animosity toward the victims and she couldn’t wait to move out of their home, officials said.

Fox has a documented history of mental health issues, but she also has an extensive history of violence, criminal conduct and substance abuse, officials said.

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During the sentencing hearing, prosecutors shared text messages Fox sent days before the murders that indicated she was attempting to obtain marijuana from a would-be roommate, who failed to secure a rental property for them.

Fox will serve her sentence in the Illinois Department of Corrections system, authorities said.