Charleston shooter Dylann Roof’s younger sister was arrested on Wednesday after bringing drugs and weapons to her high school, reports CNN.

A school resource officer allegedly detained Morgan Roof after pepper spray, marijuana and a knife were found in her possession. The 18-year-old attends the C. Flora High School in Columbia, South Carolina.

While some of her classmates participated in the nationwide school walkout protesting gun violence. It is reported that Roof shared an eerie message on Snapchat.

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According to Fox 57, the alleged post read: “Your [sic] walking out for the allowed time of 17min, They are letting you do this, nothing is going to change what tf [sic] you think it’s gonna do? I hope it’s a trap and y’all get shot we know it’s fixing to be nothing but Black people walkin out anyway.”

No students were harmed in the incident. The school sent out a letter addressing the situation and thanking students and staff for reporting suspicious behavior. Roof was charged with two counts of carrying weapons on school grounds and possession of marijuana. Her bond was set at $5,000. A judge also provided the condition that Roof does not return to the school.

Morgan’s brother, Dylann Roof pleaded guilty in 2017 to killing nine African-American people after walking into a historically black church in Charleston, South Carolina in 2015.