Gun used in Michigan school shooting purchased by suspect's father on Black Friday

The gun that was used in the Michigan school shooting was purchased by the suspect’s father on Black Friday, according to authorities. 

Police said the unidentified 15-year-old suspect used a 9mm Sig Sauer, which contained several rounds of ammunition when authorities recovered it. 

The suspect’s father bought the gun on Nov. 26. 

"When they took it from him, he had a loaded firearm and he was coming down the hall," Oakland County Sheriff Michael Bouchard said at a news conference Tuesday. "That, again, I believe interrupted what potentially could have been seven more victims."