A 17-year-old boy has become the fourth student to die following the shooting at Oxford High School in Michigan.
Justin Shilling, died around 10.45am on Wednesday, Dec 1, at McLaren Oakland Hospital in Pontiac, according to the Oakland County Sheriffâ€™s Office.
He is the fourth person killed in the shooting that took place at the high school on Tuesday afternoon.
The three other students who were killed Tuesday include Tate Myre, 16; Hana St Juliana, 14; and Madisyn Baldwin, 17
The suspected shooter, a 15-year-old boy, remains in custody at a juvenile detention center where he is reportedly not cooperating with police.
The suspect reportedly posted pictures of the semiautomatic handgun he used to open fire on classmates and teachers to social media before the massacre
His father had purchased the gun four days earlier.
"He came out with the intent to kill people. He was shooting people at close range often times toward the head or chest,"Â Sheriff Michael BouchardÂ said on CNNÂ on Wednesday morning. "Itâ€™s chilling. Itâ€™s justÂ absolutely cold-hearted murderous."
Police said they were unaware of any threats made to the community before the shooting, but some parents and students said they heard rumors that something bad might happen.
Some parents even kept children home over fears something would occur, including Robin Redding whose son Treshan Bryant said he heard vague threats of a school shooting "for a long time now."
Community members gathered Tuesday evening to mourn the lives lost in the school shooting.
A prayer vigil was held at Lake Point Community Church in Oxford, Michigan where. Community members prayed for the community and the families of those killed and injured.