MNA arrest: What is the leak UPAC is investigating?

QUEBEC — A longtime Liberal member of the Quebec legislature stepped away from the party on Thursday following his arrest by the province’s anti-corruption unit.
Guy Ouellette, 65, was arrested in connection with an investigation by the unit, known as UPAC, into an important information leak to the media last April, a government source told The Canadian Press.
In a statement, the Liberals said Ouellette would step aside temporarily pending the outcome of proceedings involving the pro