Police in Montreal are investigating the murder of Nicolo Rizzuto — head of what was once Canada’s most powerful organized-crime family.Police say someone shot the 86 year-old Mafia boss through a window of his mansion Wednesday in front of his wife and daughter.Experts on Canadian organized crime suspect a rival Mafia family killed Rizzuto, looking to carry out what they say would be the final blow against the Rizzuto family.Several other Rizzuto family members and associates have been murdered, jailed, or have disappeared in recent years.Nicolo Rizzuto emigrated to Canada from his native Sicily in the 1950s – Voanews