Former principal secretary to give his side of SNC-Lavalin story

Prime Minister Justin Trudeau's former principal secretary, Gerald Butts, will be giving his side of the story in the SNC-Lavalin affair.

Butts wrote the House of Commons justice committee yesterday, requesting he be called as a witness.

The Liberal-dominated committee announced later that it will invite Butts to appear next Wednesday or soon thereafter.

It will also recall Michael Wernick, clerk of the Privy Council, and Nathalie Drouin, the deputy minister of justice.

Butts' request came one day after former attorney general Jody Wilson-Raybould testified that she faced relentless pressure from Butts, Prime Minister Trudeau, senior prime-ministerial aides, Canada's top public servant and the finance minister's office.

She said they all wanted her to interfere in the criminal prosecution of Montreal-based engineering giant SNC-Lavalin, which she refused to do.

Butts said he believes he has evidence that will help the committee get to the bottom of the affair.

He added that he'll need a short time to receive legal advice and compile relevant documents before testifying.