BIRMINGHAM (WWJ)- An 18-year-old black student has been charged with ethnic intimidation following an investigation into racist graffiti aimed at blacks that was scrawled across a boy’s restroom wall last month at Seaholm High School in Birmingham.

A letter written with derogatory language was found the next day in a teacher’s mailbox.

The Oakland County prosecutor’s office says that Courtney Thomas is scheduled to be arraigned Wednesday morning in 48th District Court in Bloomfield Township.

A school administrator says Thomas has been suspended from school, but can’t comment further on the incident.

Oakland County Prosecutor Jessica Cooper said the student is charged with one count of ethnic intimidation. His arraignment is scheduled for Wednesday.

The graffiti was discovered last month, and prompted meetings of the school’s Diversity Club.