Cassandra Ayon

Ayon, circa 2020; Ayon wearing the clothes she was wearing the night she disappeared; Ayon's tattoos; Ayon's 2015 Chevrolet Impala; Jesus Contreras Perez

  • Missing Since 10/03/2020
  • Missing From Unity, Wisconsin
  • Classification Endangered Missing
  • Sex Female
  • Race Hispanic
  • Date of Birth 09/01/1993 (30)
  • Age 27 years old
  • Height and Weight 5'4, 185 pounds
  • Clothing/Jewelry Description A black long-sleeved shirt, blue jeans and brown boots. A photo of Ayon in those clothes is posted with this case summary.
  • Associated Vehicle(s) Black 2015 Chevrolet Impala with the Wisconsin license plate number AHZ-2509
  • Distinguishing Characteristics Hispanic female. Black hair, brown eyes. Ayon's nickname is Cassy. Her ears are pierced. She has a tattoo of roses, rosary beads, a dove and the name "Alberto" on her left forearm, and a tattoo of roses on her right upper arm and shoulder. Photos of these tattoos are posted with this case summary. Ayon speaks both English and Spanish.

Details of Disappearance

Ayon was last seen leaving a friend's house in Unity, Wisconsin at 3:45 a.m. on October 3, 2020. She lived in Loyal, Wisconsin at the time. She was driving a black 2015 Chevrolet Impala with the Wisconsin license plate number AHZ-2509; a photo of it is posted with this case summary. It has never been recovered.

She had plans to meet two friends later that day to go shopping, but never showed up for their meeting or contacted them. She has never been heard from again. Since Ayon's disappearance, there has not been any activity of her bank accounts. She did not have a passport and there is no indication that she left the United States.

Prior to her disappearance, Ayon had ended her relationship with Jesus Contreras Perez, who is the father of her child. She told friends that he was physically abusive, had threatened her life and had been unfaithful to her. She also said he was very jealous and, once when he saw her at a tavern with two men, "freaked out" and threatened to hurt her if he saw her with the men again. Ayon also claimed Contreras Perez had been following her, and that if anything happened to her, he probably did it.

Contreras Perez was charged with stalking resulting in bodily harm in Ayon's case in May 2021. In June, he was additionally charged with being a party to the crimes of first-degree intentional homicide, hiding a corpse and stalking. A photo of Contreras Perez is posted with this case summary. He was convicted of all charges at trial in June 2022 and sentenced to life in prison without parole.

His Google search history for the dates of September 26 and 27, 2020 showed searches for things such as "how to make a homemade silencer", "building a fuel filter suppressor", and "homemade suppressor demo for .30-06". Authorities also determined that Contreras Perez and Ayon's cellular phones were in the same locations at the same time on the day of her disappearance. Contreras Perez later reported he had misplaced his phone, which was a work-issued device.

Ayon's body and her car have not been recovered, but foul play is suspected in her case due to the circumstances involved.

Investigating Agency

  • Clark County Sheriffs Office 715-743-3157

Updated 2 times since October 12, 2004. Last updated September 19, 2023; details of disappearance updated.