Judge Larsen presided over both the trial court and pre-trial detention hearings for Mogens Hauschildt, who was charged with fraud. Hauschildt was held in pre-trial detention from January 1980 until his trial began in April 1981. Judge Larsen ordered Hauschildt's detention in solitary confinement multiple times and also approved international cooperation requests by the police during their investigation. Ultimately, Judge Larsen found Hauschildt guilty at trial and sentenced him to seven years in prison. Hauschildt appealed and received a reduced sentence of five years from a higher court.