A New Orleans school psychologist is under fire for posting racially inflammatory comments on Twitter amid a debate about the school system’s treatment of Black and special education students. The Jefferson Parish school system is investigating Mark Traina after posting, “Serpas should be warning people to STAY THE HELL OUT OF NEW ORLEANS! These Black Dudes will Kill You!” on his Twitter feed and on the NOLA.com website. The Southern Poverty Law Center has taking the matter into their own hands by complaining to the U.S. Department of Education about Traina’s comments the day after filing a federal complaint against the Jefferson Parish Public Schools for alleged discrimination against Black students.

This isn’t the first time Traina has trained his tweets on the African American community. In an April tweet, he wrote that 17-year-old Trayvon Martin’s killer George Zimmerman was “the real victim and held his ground.”