The teenager who committed the deadliest high school shooting in Michigan history, killing four students and injuring seven other people, was sentenced to life in prison without the possibility of parole on Friday.

Ethan Crumbley was a 15-year-old sophomore at Oxford High School in suburban Detroit on Nov. 30, 2021, when he pulled a 9 millimeter Sig Sauer handgun out of his backpack. He had persuaded his father to purchase the gun for him just days earlier.

Killed in the attack were Madisyn Baldwin, 17; Tate Myre, 16; Justin Shilling, 17; and Hana St. Juliana, 14.

Michigan does not have the death penalty, so the sentence imposed by Judge Kwamé Rowe was the harshest available. In September, he ruled that despite being a minor, and despite his difficult life, Ethan was eligible for a sentence of life without parole. He had pleaded guilty to 24 charges, including first-degree murder.