Ryan Ernest Roy has been sentenced to life in prison with no chance of parole for 16 years for murdering his mother and setting her home on fire.
Roy, 26, pleaded guilty to second-degree murder and arson in connection with the death of Phyllis Roy, 52, in her home near Hartland on March 2, 2015.
Court of Queen's Bench Justice Tracey DeWare imposed the sentence on Friday after listening to sentencing recommendations from the Crown and defence on Wednesday.
Crown prosecutor Chris Lavigne had recommended Roy serve 19 years before becoming eligible for parole, citing his lack of remorse and the heinous nature of the crime.
Ed Derrah, a defence lawyer, pointed to Roy's troubled history of abuse, anger and multiple diagnoses of mental health issues in recommending he serve 15 years before having a chance at being paroled.
After the sentencing, the family of Phyllis Roy released a statement, thanking friends and the community for their support since the murder.
"Her passing has been very difficult for our family and, over the past several months, we have been adjusting to life without her," said the statement.
"With the court process now concluded, we can put the tragic circumstances surrounding Phyllis's death behind us and move forward by focusing on who Phyllis was and not on how she died. As a family, we are committed to honouring her life by living each day with kind and open hearts."
Second-degree murder carries an automatic life sentence with no chance of parole for at least 10 years. It is up to the judge to determine how long a convicted person must serve before becoming eligible for parole.
Roy's sentencing hearing on Wednesday heard he was acting "paranoid" in the days leading up to when he killed his mother.
Fire crews were called to the Roy home in Peel at 4:30 a.m. on March 2 to find the home ablaze. When the fire was put out, Phyllis Roy's body was found inside with multiple stab wounds.
A psychiatric assessment found Roy did not have a mental disorder.