We are sad to announce that a fourth victim has succumbed to his injuries, the Oakland County Sheriff’s Department said on their Facebook page.
Justin Shilling, 17, died in hospital Wednesday morning, Sheriff Michael Bouchard told AFP.
The day before, a 15-year-old student at an Oxford high school on the outskirts of Detroit, Michigan, shot dead three students aged 14 to 17 and injured eight people, including a teacher.
Six injured students remained hospitalized Wednesday while the teacher, slightly injured in the shoulder, left the hospital on Tuesday.
The student, whose identity has not been made public, used a 9mm-caliber Sig Sauer SP2022 semi-automatic pistol, purchased by his father on Friday, the day of the big Black Friday promotions, according to police.
He clearly came to kill peopleSheriff Bouchard said on CNN on Wednesday, noting that he had fired at least 30 bullets.
He would shoot people at point blank range, often aiming at the head or chest, he added.
The gunman went to the police inside the school itself and was taken into custody. He remained silent on the motives for his gesture, his parents having asked him not to speak to the police, according to the authorities.
Oakland County Prosecutor Karen McDonald is due to announce the indictment of the young gunman on Wednesday, according to her services.
Massive shootings remain a recurring scourge in the United States, where the right to own guns is constitutionally guaranteed.