The younger sister of Dylann Roof, the convicted mass murderer who killed nine black people at Mother Emanuel AME church, was arrested Wednesday for allegedly bringing weapons to her South Carolina high school.

Morgan Roof, 18, brought pepper spray and a knife to A.C. Flora High School in Columbia, South Carolina on the same day as the National Student Walkout. Hundreds of thousands of students nationwide walked out of class Wednesday in protest of gun violence.

The school was also alerted that the younger Roof had posted threatening content on her snapchat against her classmates for joining in the walkouts.

“I hope it’s a trap and y’all get shot,” Roof wrote of the protest at her school, according to a screenshot of her Snapchat post. “We know it’s fixing to be nothing but black people walkin out anyway.”

According to NBC News, the school’s principal wrote a letter to parents saying that the walkout at the school generally went well, but referenced an incident in which a student “used social media to post a hateful message.”

“The posting was not a threat, but was extremely inappropriate,” principal Susan Childs wrote. “That student was dealt with in a swift and severe manner as the posting caused quite a disruption.” 

Roof was charged with possession of marijuana and two counts of carrying weapons on school grounds, according to The State newspaper.  She was released on a $5,000 bond with the condition that she not return to school.

Her brother, Dylann, is currently waiting execution after he was sentenced to death in January 2017. 

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