A 16-year-old pleaded guilty to felony murder and attempted first-degree criminal sexual conduct in a Michigan court Monday.
Joshua Keyzer, who was 15 when the incident occurred in June 2014, killed his 21-year-old cousin Kassandra Keyzer at his grandmother’s house.
“I, uh, killed her, ma’am,” Keyzer told Allegan County Circuit Judge Margaret Zuzich-Bakker via video link, as reported by MLive.
Keyzer’s admission was part of a plea agreement to avoid life in prison without the possibility of parole, the sentence for adults found guilty of felony or first-degree murder.
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Prior to the hearing, two court-ordered psychiatric assessments of Keyzer found him fit to stand trial.
Keyzer’s grandmother, Sharon Keyzer, called the police June 25 after her grandson had slashed her throat. Although she recovered from the injury, she died six months later of cancer.
The police reported being met by Sharon holding a blood-soaked towel to her neck. They found Joshua on the roof of the home, covered in blood and holding a knife. He fell into some bushes and tried to escape, but police subdued him with a Taser, according to authorities.
The police then found Kassandra inside the home. She had bled profusely from deep lacerations to her throat, and her clothes had been cut off.
Joshua had also written "my bad" in blood on the wall, and footprints could be seen leaving the room.
Kassandra was set to marry her fiancé, Robert Johnson, a month later, according to the Daily Mail.
She had a 2-year-old son and was a computer science college student.
Keyzer is due to be sentenced for his crimes June 15, with prosecutors expected to push for a 40- to 60-year prison term.