A school board in Missouri has fired a tenured science teacher after he allegedly used racial slurs and referred to Martin Luther King Jr. Day as “Black Privilege Day” during his classes, reports Newsweek.

The Harrisonville School Board voted to fire John Magoffin during a closed session last week after an investigation by the school’s principal found incidents that allegedly occurred in three different classes: AP biology, physics and advisory.

The principal of Harrisonville High School reported that students alleged that Magoffin, who had been with the district since 2012, used a racial slur during a conversation about rap culture in one of his classes and that he told students he had never seen racism in the U.S.

It was also discovered by the principal that the teacher had called Martin Luther King Jr. Day “Black Privilege Day.” One student interviewed by the principal further alleged that she was not allowed to remove her face mask for a break because she is Black.