A federal judge in Atlanta has refused to dismiss a free speech lawsuit brought by a high school freshman and his father after the teen was suspended for having a sticker on his cellphone that called for the ouster of the school principal.

Judge Mark Cohen of the U.S. District Court for the Northern District of Georgia ruled that he could “reasonably infer” from allegations in a civil suit filed by Chamblee Charter High School freshman Keegan Brooks and his father Russell Brooks that the student was unconstitutionally punished by school administrators because of the viewpoint he expressed.