The Mr. Roy in question has sent a letter to the CBC asking it to retract, because his lawyers are saying he was never under investigation by the RCMP.
Before rising in the House and saying he is under investigation, it would not be a bad idea to do a little research.
As to our course of action, in all such cases I consult the ethics commissioner. I did so in this one. He is looking into the matter. I consult him each time a question of ethics is raised in the House. I discuss it with Mr. Wilson so he can check the facts.