An autopsy has failed to determine the cause of death of a man in northwest Calgary, whose death is still being investigated as suspicious. Police were called to a residence in Crescent Heights around 6:30 p.m. on June 6th for reports of an altercation. They discovered a man in medical distress upon arrival, but he later passed away. One person was initially detained but subsequently released without charges. The Homicide Unit is continuing its investigation, seeking any relevant information from the public.