The mother of the two children killed by former Que. physician Guy Turcotte says she had convinced herself to be grateful she knew her children, rather than than regret their deaths.

lengthy interview with Isabelle Gaston  aired Sunday night on Radio-Canada's On prend toujours un train pour la vie. It was recorded in August 2010, but Radio-Canada was not allowed to air it until Turcotte's murder trial had concluded.

Last week, Turcotte, 39, was found not criminally responsible for stabbing to death the two young children by a jury in Saint-Jérôme, Que. after a trial that lasted more than two months.

Gaston said the verdict disappointed her, but admitted that even a first-degree murder conviction would not have satisfied her, because it still would not have brought her children back.

In the interview, Gaston wondered how Turcotte, a cardiologist who saved lives, could kill his own children.

Gaston also spoke of dealing with the tragedy.

"It's terrible, but what happened is fixed in my head. I can't exaggerate or minimize how bad it was...all I can do is can leave and begin mourning what he did to my children," said Gaston.

Gaston also said she actively chose how she would perceive what had happened.

"Instead of saying I was unfortunate to lose them, I think about how fortunate I was to have known them," she said.

Public outcry

The verdict has also received a bitter reaction from the public.

An online petition calling for a revision of the Turcotte verdict now has more than 6,000 signatures.

"Considering that we pay for justice services, we feel the service was not rendered fairly," the petition reads.

Several Facebook groups have also emerged calling for peaceful protests in front of courthouses in Quebec City and Montreal in early August.