An arrest warrant is out for Robert Gaudette, who vanished from the facility north of Montreal early Tuesday morning.
Sources say he escaped by hopping out a window in his room in a minimum-security housing unit.
The 55-year-old Gaudette had been behind bars since receiving a life sentence in 2002 for the second-degree murder of his wife, Cindy Bouchard.
He was set to have a parole hearing soon.
Gaudette was discovered missing during a 5 a.m. head count at the Federal Training Centre in Laval, which is comprised of both a minimum- and medium-security facility.
He is five-foot-11, 189 pounds with a pale complexion, green eyes and brown hair. He has a surgical scar on the abdomen.
Provincial police Sgt. Audrey-Anne Bilodeau said Wednesday investigators had no new information to share.
The public should not approach Gaudette if they see him but should call 911 right away, she said.
The Correctional Service said it will conduct an investigation into the circumstances surrounding the escape.
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