A teenager accused of killing four students with a semi-automatic handgun gifted to him by his father for Christmas has pleaded guilty to the charges.
He was 15 years when he opened fire at Oxford High School, last year November. The gunman faces a possible life sentence without parole
Ethan Crumbley, 16, is being tried as an adult and is facing charges of terrorism and first-degree murder.
On Monday, Crumbley pleaded guilty in a Michigan court to 24 charges, including one count of terrorism, four counts of first-degree murder, seven counts of assault with intent to murder and 12 counts of possession of a firearm.
The terrorism charge is an unusual one in US school shooting cases. Prosecutors said they brought the charge forward to acknowledge the impact the shooting rampage had on the community at large.
The gunman agreed that on 30 November, he packed a handgun and ammunition in his backpack and brought it to school.
He then loaded the firearm in the bathroom before firing more than 30 shots at staff and students in the school hallway.
Four students were killed in the shooting Rampage while Six other students and a teacher were injured.
Prosecutors have argued the attack was planned saying the boy had spoken about killing students the night before the shooting.
The parents to the gunman are also facing four counts of involuntary manslaughter.
Prosecutors have argued that they ignored warning signs of violence and did not store the gun their son used in a safe place. They have both pleaded not guilty.
The case is likely to be the first in the US in which the parents of a young school shooter have also been charged
