Man pleads guilty to manslaughter in 2023 Jamestown stabbing death

Tyler Abbott sentenced to 8 years in prison for killing Theresa Agawa

Published on Feb. 9, 2026

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Tyler Abbott has been sentenced to eight years in prison after pleading guilty to the 2023 manslaughter of Theresa Agawa, who died nearly two weeks after being stabbed. Abbott was initially charged with second-degree murder but the charge was reduced to manslaughter as part of a plea deal.

Why it matters

This case highlights the complex issues surrounding violent crimes, including the role of mental health, substance abuse, and distrust of the medical system, especially among marginalized communities. The plea deal and sentencing also raise questions about accountability and appropriate punishment for manslaughter.

The details

On August 20, 2023, Theresa Agawa was stabbed once in the abdomen by Tyler Abbott in Jamestown. Agawa initially survived the attack but later died on September 1, 2023 due to complications from the wound. Abbott fled to Toronto but was later arrested and charged with second-degree murder. As part of a plea deal, Abbott pleaded guilty to the lesser charge of manslaughter and was sentenced to 8 years in prison.

  • On August 20, 2023, Agawa was stabbed by Abbott.
  • On September 1, 2023, Agawa died from complications related to the stabbing.
  • On August 10, 2024, Abbott was arrested by Toronto police.
  • On February 9, 2026, Abbott pleaded guilty to manslaughter and was sentenced to 8 years in prison.

The players

Tyler Abbott

The man who pleaded guilty to manslaughter for the 2023 stabbing death of Theresa Agawa. Abbott had a history of alcohol abuse and drug use.

Theresa Agawa

The 42-year-old woman who died nearly two weeks after being stabbed by Tyler Abbott in 2023.

Stephanie Dinsmore

Agawa's older sister, who provided a victim impact statement describing the loss and impact on the family.

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What they’re saying

“I didn't mean to hurt her. I do feel bad.”

— Tyler Abbott (sootoday.com)

“Now we will never hear her laugh and teasing her nieces and nephews.”

— Stephanie Dinsmore, Agawa's older sister (sootoday.com)

What’s next

The judge in the case will decide on Tuesday whether or not to allow Tyler Abbott out on bail pending his sentencing for the recent aggravated assault and robbery conviction in Toronto.

The takeaway

This tragic case highlights the need for greater mental health and addiction support services, as well as improved trust and access to the medical system, especially for marginalized communities. It also raises questions about sentencing guidelines and accountability for manslaughter crimes involving violence.