Justice Michelle Fuerst sentenced Mark Gordon to life for the Oshawa shootings of Patrick and Andrieana Montgomery.

Tuesday's order is the sentence on those guilty pleas. Global News reported the Crown asked for 23 years before parole eligibility and the defence asked for 15 to 18. The judge set 21, concurrent, not consecutive. The same story spells her first name Andrieana and Andriena.

Global News reported Tuesday, Oct. 27, 2026, that Mark Gordon sat in the prisoner's box in a packed courtroom in Oshawa while Justice Michelle Fuerst sentenced him, at 33, to two concurrent life sentences with no eligibility for parole for 21 years. The story, by Catherine McDonald, was posted at 6:56 p.m. and updated at 10:25 p.m. It reported he pleaded guilty in September 2025 to two counts of second-degree murder, admitting that on July 13, 2024, he fired multiple shots at 42-year-old Patrick Montgomery in front of the Glenforest Street home where Patrick lived. It reported Patrick was shot nine times, including four times in the back. A life term on a guilty plea is the court's judgment on those counts. The 21 years is the period before parole eligibility, not a calendar date of release.

Global News reported Gordon then drove about 400 metres down Glenforest Street to the home where 42-year-old Andrieana Montgomery, Patrick's ex-wife, rented the upstairs unit. It reported she was a Bowmanville teacher and that he had played for the Oshawa Generals. It reported Gordon got out of his pickup, fired six shots from outside while she stood at the sink looking out the front window, went inside, and fired three more. It reported she was shot four times, including once in the head. Later in the same story the spelling changes to Andriena. Andrieana and Andriena are the two spellings Global News used. They are not two people.

Global News reported Gordon rented the basement under her unit and that the two did not get along. It reported that in the months before July 13, 2024, they argued about noise, and that during one argument in the winter of 2023 he told her he had a gun. It reported he lawfully owned a Glock 17 Gen 5 semi-automatic 9mm handgun and some rifles, kept them in a metal safe, and had a valid possession and acquisition licence. It reported she felt threatened, complained to the shared landlord about the noise and about the firearm, and on May 8, 2024, contacted the City of Oshawa to report that the basement did not meet the legal requirements for a basement suite. It reported the city contacted the landlord, the landlord decided to evict Gordon, and he was served on July 12, 2024. The shootings were the next day. A pre-sentence report, the story said, recorded his own words that she was bullying him and that he disliked being bullied, and that the eviction notice was the last straw. What he told the report writer is his account of his motive. The guilty pleas are what he admitted in court.

Global News reported Fuerst called the attack extremely violent and callous, and said Gordon knew he was leaving children without parents. The children are not named here. It reported she said the callousness of acting with that knowledge was immense, that both victims were defenceless, and that his moral blameworthiness was high. It quoted her: "His perceptions about Ms. Montgomery fueled an extreme and unjustifiable over-reaction to the news of his family's pending eviction." It reported she said he had several chances to stop, and that Patrick Montgomery's words, "Please don't," had no effect. It reported a child was outside when Patrick was shot, and that the child is not named. It quoted Fuerst on that child's fear when Gordon looked at him and the child put his hands up. The quote is the judge's reason. It is not a name.

What she treated as mitigation is also in that story. Global News reported Gordon was arrested at the scene on July 13, 2024, and has been in custody since. It reported that after the shootings he left the handgun in plain sight in the apartment, waited outside for police, and told the first officer he was the person who shot them. It quoted Fuerst: "He did not get rid of the firearms, flee the area or take any steps to conceal his responsibility for the murders." It reported she also counted the guilty plea and his status as a first-time offender. It reported he apologized in court, said he was wrong, said he was the only person to blame, and said he regrets everything. Assistant Crown prosecutors Gregory Black and Kylie Buker asked for 23 years before parole eligibility, Global News reported, and defence lawyer Daisy Bygrave suggested 15 to 18. It reported Fuerst said 23 years would give too little weight to the plea and the lack of a record, and that 15 to 18 years would give too little weight to the aggravating facts. Twenty-one years, concurrent on the two life terms, is the period she set. All defendants are presumed innocent until proven guilty in a court of law.