(Columbia, SC) -- Dylann Roof's sister is now facing her own legal troubles.
Morgan Roof was arrested yesterday for having a weapon and drugs on school property. Richland County deputies say the 18-year-old had a knife, pepper spray and marijuana while at AC Flora High School.
The arrest was made after Roof made a post on social media saying "I hope it's a trap and y'all get shot". A reference to students participating in yesterday's walkout.
In another incident, deputies also found a gun on school grounds and arrested two 16-year-old students.