Jennifer Crumbley, the mother of a teenager who killed four others at a Michigan school, has been convicted of involuntary manslaughter.

A Michigan jury has found the mother of a young gunman who opened fire at a school, killing four students in 2021, guilty of involuntary manslaughter.

The jury began deliberating Monday after seven days of testimony concluded Friday.

Prosecutors allege that Jennifer Crumbley did not tell Oxford High School that the family owned firearms, including a 9mm pistol, that her son, Ethan Crumbley, had used at the shooting range since Nov. 30, 2021, the weekend of the attack. Alleged gross negligence. .

The jury sent a note to the judge Monday afternoon asking if he could “infer anything” from prosecutors’ failure to present Ethan Crumbley or others to specifically explain how he got the gun from the home to shoot at Oxford High School.

“The answer is no,” said Oakland County Judge Cheryl Matthews. “Only evidence admitted in the case is allowed to be considered.”

Prosecutors say Jennifer Crumbley had a duty under Michigan law to prevent her son, who was 15 at the time, from harming others. She is accused of failing to get a gun and ammunition into her home and failing to get help for her son’s mental health.

On the morning of November 30, 2021, school staff were concerned about Ethan Crumbley’s math homework, a violent picture of a gun, bullet and a wounded man with desperate phrases. He was allowed to stay at school after a meeting with his parents, who did not take him home.

A few hours later, Ethan Crumbley pulled a gun from his backpack and shot 10 students and a teacher, killing four classmates. No one checked the backpack.

The gun was a 9mm Sig Sauer that her father, James Crumbley, had bought her four days earlier. Jennifer Crumbley took her son to the shooting range that same weekend.

“You’re the last adult to own that gun,” Deputy Prosecutor Mark Keast said while questioning Jennifer Crumbley last week. “You saw your son shoot the last practice round before the (school) shooting on November 30th. You saw how it arose. …He knew how to use a gun.”

“Yes, he did,” replied the teenager’s mother.

Ethan Crumbley, now 17, pleaded guilty to murder and terrorism and is serving a life sentence. Prosecutors didn’t have to call her as a witness to try to prove their case against Jennifer Crumbley.

His lawyer argued last week that the teenager could help in his defense. It didn’t matter: The judge kept him off the witness stand because Ethan Crumbley’s lawyers said he would invoke his right to remain silent. He can still appeal his sentence.

Jennifer and James Crumbley are the first parents in the United States to be charged in connection with a mass school shooting by their son. James Crumbley, 47, faces trial in March.

Jennifer Crumbley, 45, told jurors it was her husband’s job to keep an eye on the gun. He also said that he did not see any signs of mental distress in his son.

“We will talk. We did a lot of things together,” she testified. “I trusted him and felt like I had an open door. “He can come to me for anything.”

In a diary found by police, Ethan Crumbley wrote that his parents did not listen to his pleas for help.

“I have no help for my mental issues and I am shooting myself at school because of it,” she wrote.