Two Frisco teenagers are behind bars, accused of vandalizing Plano West Senior High School.
Alexandria Butler and Elizabeth Police are both 17-years old.
Investigators say two months ago, the young women spray painted racial slurs and vulgarities on the walls of Plano West.
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Shortly after, police released surveillance footage showing the vandalism (seen above).
A third teenager is also expected to be arrested. Police say the 19-year-old has agreed to turn herself in.