Constantine Kyres, who headed the tax group in Dentons’ Montreal office until earlier this year, has been charged with extortion and obstruction of justice by prosecutors in Canada as a result of a long-running corruption probe involving a top Canadian company and its alleged ties to the government of late Libyan dictator Moammar Gadhafi.

CBC News and the Global and Mail in Toronto both reported Wednesday on the charges filed against Kyres and two former executives at Canadian construction and engineering giant SNC-Lavalin. Kyres, who joined Dentons in 2013 after the global legal giant absorbed his former firm Fraser Milner Casgrain, left the combined entity earlier this year to open his own practice in Montreal.