The mother of a man killed by Utah police considered herself a “sovereign citizen” in a lawsuit against the same law enforcement department that took her son’s life.

Chase Allan, 25, was fatally shot on 1 March during a traffic stop in Farmington, north of Salt Lake City. Following the tragedy, his family said in a statement that they found out about the “brutal murder” through the news and claimed that police had been unwilling to answer their questions.