Dylann Roof's sister Morgan Roof accused of bringing weapons to school

COLUMBIA, S.C. -- Deputies said the sister of church shooter Dylann Roof was arrested Wednesday for bringing drugs, pepper spray, and a knife to her South Carolina school.

The Richland County Sheriff's Department told WIS-TV 18-year-old Morgan Roof was arrested after an administrator at A.C. Flora High School had contacted a school resource officer.

Roof is charged with marijuana possession and two counts of carrying weapons on school grounds. A judge set her bond at $5,000. She was screened for a public defender. She is not allowed to return to the school.

Investigators said Roof also posted a Snapchat that alarmed fellow students but was not arrested for it.

ABC News reports the snap read:

"Your walking out of the allowed time of 17min, they are letting you do this, nothing is gonna change what tf 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."

School principal Susan Childs posted a letter to parents on the school's Twitter page explaining what occurred while students walked out to remember the 17 killed in the Parkland, Florida, Valentine's Day school shooting.

Dylann Roof was convicted of fatally shooting nine African-American parishioners at a Charleston church in 2015 and was sentenced to death.

RELATED: Dylann Roof sentenced to death for killing 9 black Charleston church members

AP contributed to this post.