Oxford High School shooting suspect used a gun his dad bought on Black Friday, sheriffs say

• Sheriffs said the gun used in a shooting at a Michigan high school was purchased on Black Friday.
• A 15-year-old student fatally shot three people on Tuesday using a gun his dad bought days earlier, authorities said.

The suspected shooter who police say killed three people and injured eight others at a Michigan high school on Tuesday used a pistol purchased by his father just four days earlier on Black Friday, authorities said on Tuesday.

Oakland County Sheriff Mike Bouchard said at a press conference Tuesday evening that police recovered a loaded pistol with seven rounds of ammunition from a 15-year-old sophomore at Oxford High School, north of Detroit, minutes the shooting spree.

"That, again, I believe interrupted what potentially could have been seven more victims," Bouchard said.

The handgun — a 9mm Sig Sauer SP 2022 pistol — had two 15-round magazines. A third magazine was also purchased by the suspect's father, but hasn't been located, Bouchard said.

Authorities did not say where the teen's father had purchased the gun.

Tate Myre, 16, Hana St. Juliana, 14, and Madisyn Baldwin, 17, were killed in the shooting, police said. Seven students — and a teacher — were left injured, with three in critical condition.

Video purportedly taken by Oxford High students shows a person appearing to impersonate law enforcement trying to convince the students to open a barricaded classroom door. The students refuse and then flee to safety by climbing out a window.

Oakland County Undersheriff Mike McCabe confirmed to Insider that the suspect has asked for a lawyer and a potential motive is currently unclear.

Officials have not yet released the suspect's identity; he is not speaking with authorities.