https://www.foxnews.com/us/oklahoma-woman-former-student-threatens-high-school"Oklahoma woman, 18, threatened to 'shoot 400 people for fun' at former high school, officials say
On Sunday, deputies reportedly found an AK-47 with six magazines and a 12-gauge shotgun with a stock sleeve for extra shells in Wilson's room. She purchased the gun last week with five extra high capacity magazines and
160 rounds of ammunition from a nearby shop, officials said."
"Wilson denied such threats to investigators and reportedly admitted she suffered from mental health issues, like suicidal and homicidal thoughts. She claimed she was trying to tell a co-worker that not everyone who owns a gun is bad.
The woman's mother,
according to KOKI-TV, knew her daughter had been saving up for her recently purchased AK-47, but didn't question it because "Alexis has always shot firearms and had hunted."
Per the linked article, she dropped out of school in the 9th grade. Math was probably not her strong suit. Or, she is one heckuva shot.