Updated on Dec. 1 at 12:55 p.m. ET
Authorities say a 17-year-old boy has become the fourth student to die from a school shooting in Michigan.
The Oakland County sheriff’s office identified the teen Wednesday as Justin Shilling. The shooting occurred Tuesday at Oxford High School in Oakland County. The suspect remains in custody.
Seven other people were wounded, some critically, including a 14-year-old girl who was placed on a ventilator after surgery.
Authorities say a 15-year-old sophomore opened fire at his Michigan high school.
Oakland County Sheriff Michael Bouchard says investigators are still trying to determine a motive for Tuesday's shooting.
Authorities arrested the suspect at the school and recovered a handgun.
He says the shooter isn't talking. The boy's father had bought the semi-automatic handgun used in the shooting on Friday, Bouchard said, adding that he did not know why.
The three other students who were killed were 16-year-old Tate Myre, 14-year-old Hana St. Juliana and 17-year-old Madisyn Baldwin.
Oxford Township is a community of about 22,000 people roughly 30 miles north of Detroit.