On November 30, 2021, a gunman opened fire on students and staff at Oxford High School in the Detroit exurb of Oxford Township, Michigan, United States, killing four students and injuring seven other people, including a teacher.

The accused has been named as 15-year-old sophomore Ethan Crumbley, who is in custody and has been charged as an adult for 24 crimes, including murder and terrorism. Crumbley's parents Jennifer and James were charged on December 3 with involuntary manslaughter for failing to secure the gun used in the shooting. Afterwards, they were reported missing, but they were later found in Detroit. This attack is the deadliest school shooting in the United States since the Santa Fe High School shooting in 2018

Surveillance footage reportedly showed Crumbley entering a bathroom with a backpack and then exiting it about a minute later without the backpack but with a semiautomatic handgun. Immediately afterwards, prosecutors said Crumbley started firing at students; when they started fleeing, he "methodically and deliberately" walked down the hallway and aimed his gun into classrooms and at students who were unable to escape.

At 12:51 p.m., police began receiving the first of around one hundred 9-1-1 calls about the shooting and responded to the school. Crumbley was arrested unharmed by a deputy assigned as a school resource officer and a second deputy who responded to the scene. He allegedly still had seven rounds of ammunition loaded into his gun and two 15-round magazines when he was stopped by the deputies. At a news conference, Oakland County Undersheriff Michael McCabe said the gunman gave up without any problems. The entire shooting lasted about five minutes and occurred in the southern end of the school building.

After the shooting occurred, the school went into lockdown. Some students were evacuated to a nearby Meijer store, and one woman helped children to shelter in her house

According to students, a voice over the intercom alerted them to an active shooter, and their teachers started locking and barricading doors and covering windows, convincing them it was not a drill. Others recounted hearing some loud banging noises, before realizing the noises were gunshots and quickly locking the door. One student who hid in a bathroom stall recalled hearing the sound of a gun cocking outside the bathroom. Once the school was secured, he opened the bathroom door to find several bodies lying on the floor.

The parents of a 15-year-old who shot dead four students at a US high school with a gun bought by his father were preparing 04.12.2021 to turn themselves in after being charged with involuntary manslaughter, their lawyers said.

The whereabouts of James and Jennifer Crumbley, the parents of shooting suspect Ethan Crumbley, remained unknown, prompting authorities in Oakland County, Michigan to consider them fugitives.

Oakland County prosecutor Karen McDonald, in a rare move by law enforcement, had announced that each of the parents faces four counts of involuntary manslaughter.

"These charges are intended to hold the individuals who contributed to this tragedy accountable and also send the message that gun owners have a responsibility," McDonald said at a press conference.

"While the shooter was the one who entered the high school and pulled the trigger, there are other individuals who contributed to the events on November 30."