Four Michigan high school students were shot and killed, including a "hero" 16-year-old, and seven other people were injured Tuesday afternoon during a shooting at Oxford High School. 

Oakland County Sheriff Michael Bouchard identified three of the students who died as 16-year-old Tate Myre, 14-year-old Hana St. Juliana, and 17-year-old Madisyn Baldwin. A fourth student, a 17-year-old boy, died Wednesday, according to authorities. He was identified as Justin Shilling. 

Bouchard said that Myre died inside a patrol car as deputies rushed him to a hospital. 

MICHIGAN HIGH SCHOOL SHOOTING LEAVES THREE STUDENTS DEAD; 15-YEAR-OLD SUSPECT IN CUSTODY

"One of our deputies, due to the severity of wounds, loaded up one of the children in his car and sadly, that child died in the car," Bouchard said at a press conference. "One of our employees who was in the 911 center as part of the team taking the emergency calls, had a relative killed. This touches us all personally, deeply and will for a long time."

"We will leave no stone unturned."

Parents of Michigan students of Oxford High School, after shooting

Parents walk away with their kids from the Meijer's parking lot in Oxford, Michigan, where many students gathered following an active shooter situation on Nov. 30, 2021.   (Eric Seals-USA TODAY NETWORK)

Myre, a junior and a running back on the football team, has been described as a hero by his peers. A petition is also circulating that calls on the school to rename its Wildcat Stadium after him. The petition has been signed by more than 34,000 people as of Wednesday morning

"Tate is not just a hero to his fellow students at Oxford high school but a legend, his act of bravery should be remembered forever and passed down through generations, he put his life in danger to try and help the thousands of other students at Oxford High School," petition organizer Drake Biggie wrote.

The seven who were injured included both students and a teacher.

MICHIGAN HIGH SCHOOL SHOOTING LEAVES 3 DEAD

A 17-year-old girl is in critical condition after she was shot in the chest. 

Police cars outside Oxford High School in Oxford, Michigan after shooting

Police cars line up in front of the school following an active shooter situation at Oxford High School in Oxford, Michigan, on Nov. 30, 2021. Police took a suspected shooter into custody.  (Liz Shepard-USA TODAY NETWORK)

A 14-year-old boy is in serious condition with a gunshot wound to the head and jaw. Another 14-year-old boy is on a ventilator after suffering chest and neck wounds. 

A 17-year-old girl is in stable condition after being shot in the neck, and a 15-year-old boy is also stable after being shot in the leg. 

A 47-year-old teacher was grazed by a bullet during the tragedy. 

The suspect, a 15-year-old, is in police custody and has invoked his right to remain silent, Fox 2 reported. No motive has been revealed. 

Michigan school shooting: Parents walk away with their kids from the Meijer's parking lot in Oxford

Parents walk away with their kids from the Meijer's parking lot in Oxford, Michigan, on Nov. 30, 2021. (Eric Seals-USA TODAY NETWORK)

The sophomore used his father’s 9mm Sig Sauer in the shooting, police said. The father had bought the handgun just four days before the shooting, investigators said. 

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"A search warrant was executed at the suspect's residence and is being inventoried. The firearm used was a 9mm Sig Sauer and had been purchased by the father four days prior to the incident. There was no prior information shared with the Sheriff's Office or the School Resource Officer before the incident," the Oakland County Sheriff’s Office posted on Facebook.