OXFORD TOWNSHIP, Mich. (AP) — A fourth student, a 17-year-old boy, died Wednesday from wounds he suffered when a sophomore opened fire at a Michigan high school a day earlier, authorities said.
The other dead included a 16-year-old boy who died in a deputy's patrol car on the way to a hospital. Eight people were wounded, some critically, including a 14-year-old girl who was placed on a ventilator after surgery.
Investigators were still trying to determine a motive for the shooting Tuesday at Oxford High School, located in a community of about 22,000 people roughly 30 miles (48 kilometers) north of Detroit, Oakland County Sheriff Michael Bouchard said.
"The person that's got the most insight and the motive is not talking," he said at a news conference late Tuesday.
Deputies rushed to the school around lunch time as more than 100 calls flooded 911 dispatchers with reports of a shooter. They arrested the student in a hallway within minutes of their arrival. He put his hands in the air as deputies approached, Bouchard said.
The boy's father on Friday bought the 9 mm Sig Sauer used in the shooting, Bouchard said. He didn't know why the man bought the semiautomatic handgun, which his son had been posting pictures of and practicing shooting, Bouchard said.
Authorities did not immediately release the boy's name.
The four students who were killed were 16-year-old Tate Myre, 14-year-old Hana St. Juliana, 17-year-old Madisyn Baldwin and Justin Shilling, who died Wednesday.
Bouchard said Myre died in a patrol car as a deputy tried to get him to an emergency room.
A teacher who received a graze wound to the shoulder left the hospital, but seven students ranging in age from 14 to 17 remained hospitalized through the night with gunshot wounds, he said.
The gun the boy was carrying had seven more rounds of ammo in it when he surrendered, Bouchard said.
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Associated Press writers Corey Williams in West Bloomfield, Michigan, David Aguilar in Oxford Township, Kathleen Foody in Chicago, and Josh Boak in Rosemount, Minnesota, contributed to this report.