A former student is suing his ex-girlfriend’s father for an attack at a Kansas City area high school that left the teen critically injured.

The Kansas City Star reports that Cullen Landis filed a lawsuit last month against 40-year-old Josiah Wright, who is awaiting sentencing for first-degree assault. His daughter, Jonay Wright, is serving a seven-year prison sentence for the September 2017 attack at Ruskin High School in the Hickman Mills School District.

Police reports indicate that Landis and Jonay Wright had a violent on-again-off-again relationship. Landis had received a municipal citation for assaulting her before the school attack in which he was kicked and hit. Landis, now 20, says he suffered a traumatic brain injury. He previously sued the district and several school leaders, saying they failed to keep him safe. That suit is pending.