A 17-year-old is facing charges of first-degree murder and assaulting a police officer following what police are calling a case of intimate partner violence.
The Brockville Police Service said it responded to a 911 call reporting three people dead at a residence on Cartier Court around 11:30 a.m. Thursday. Officers confirmed that all three people were deceased and deemed the deaths suspicious in nature, according to a statement on the Brockville, Ont., police Facebook page.
During a press conference Friday afternoon, Inspector Darryl Boyd identified the victims as a 49-year-old mother and her two daughters, aged 15 and 17.
Police said they received “additional information” that led them to an address on the outskirts of Brockville. At this location, police got into an altercation with a 17-year-old suspect. The youth was taken into custody and charged with three counts of first-degree murder and assault of a police officer.
Officers confirmed the incident was not random. Boyd said the accused was in a relationship with one of the deceased daughters. He said it is a case of intimate partner violence and femicide.
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Boyd said the investigation is “large, complex and ongoing.”
“Our focus is on trying to bring some closure to the families involved,” he said.
Boyd said this is the first murder investigation Brockville police has undertaken in several years and the largest investigation since he joined the force.
At this time, Boyd said police believe a knife was involved in the incident.
The accused appeared in court Friday morning. He remains in custody and is expected back in court on May 28.
The community is grieving, Michael Barrett, MP for the area said in a statement on social media, adding his thanks to the first responder who attended the scene under “difficult circumstances”.
“I’m praying for the families, friends, and all those affected by this heartbreaking event,” said the representative for Leeds–Grenville–Thousand Islands–Rideau Lakes.
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MPP Steve Clark, who represents the area provincially, asked for members of the community to continue to support one another as the investigation continues.
Brockville Mayor Matt Wren called the incident an “unspeakable tragedy”.
“If anyone in our community needs support, I encourage them to reach out to resources such as Interval House,” he said. “We are painfully confronted with a need to recognize and respond to the realities many women face. “
“This tragedy is also a painful reminder of the reality of femicide — the killing of women and girls because of gender-based violence, often at the hands of a current or former intimate partner,” a spokesperson for Leeds & Grenville Interval House, a local women’s shelter, said on Facebook. “Across Canada, women and girls continue to lose their lives to violence in homes, relationships, and communities that should be safe.”
According to the Ontario Association of Interval and Transition Houses, there were eight femicides reported in Ontario between November 2025 and March 2026.
Flags at Brockville city facilities have been lowered.
Anyone with information is asked to contact the Brockville Police Service.
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