The rivalry game took place Oct. 16 at Northwestern University’s Ryan Field, with more than 27,000 tickets sold. In a joint statement, Evanston Township High School District 202 and New Trier Township High School District 203 said Evanston band members faced offensive comments and behavior from New Trier fans near the sidelines. The allegations have not been adjudicated.

In a letter to New Trier Superintendent Peter Tragos, Britton, a Democrat representing the 14th District, called for “real action, repair, and continued education.” He wrote that the school’s sports program had faced a previous bullying allegation that had come to his attention, adding that he hoped this incident would be the last.

Evanston color guard members Kevin Watts and Kiro Tabor said they were preparing to perform when they heard aggressive chants from the opposing student section. Watts said the comments began with profanity and escalated: one person used an anti-gay slur toward him, while a group called Tabor the N-word, he said.

Britton warned that failing to address harm can embolden further hate. He cited the recent arrest of a 19-year-old Palatine man accused of plotting a mass shooting at a Hindu temple, while noting the alleged plot was foiled. The case is separate from the football-game investigation.

The Illinois High School Association said it has contacted both school administrations and will work with them as it determines next steps. Its executive director, Craig Anderson, said Tuesday the organization would continue working with the schools.