The Siderno Group had also moved into the Toronto construction industry and in particular specialized in taking over bids to build public buildings in order to inflate the costs with the additional costs being profit to them. The Toronto-based Commisso 'ndrina clan of the Siderno group were described by the end of 1970s as running a crime empire that "imported and distributed heroin with the Vancouver mob and the Calabrian Mafia in Italy, fenced stolen goods across North America, printed and distributed counterfeit money throughout Canada and the United States, ran a vast extortion network in Ontario, arranged insurance and land frauds in the Toronto area and engaged in contract killings and contract enforcement work across Canada and the United States– the whole gamut of violent criminal activities one usually associates with the Mafia". Cecil Kirby, a biker who worked as an enforcer and a hitman for the Commisso 'ndrina between 1976-1981 wrote in his 1986 book "Mafia Enforcer": "I quickly learned that their big thing for making money was the construction industry. They probably made more money from extortions in the construction industry than they did from trafficking in heroin - and it was a helluva lot safer". The Commisso 'ndrina clan was led by the three Commisso brothers, Rocco, Michele and Cosimo, whose principle interest in life besides for making money was avenging the murder of their father, Girolomo Commisso, who had killed in 1948 in Siderno by rival gangsters.