Assault With Sword Leads To Arrest – August 30, 2025 - 09/02/25
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News Release Corvallis Police Department 180 NW 5th Street Corvallis, OR 97330 541-766-6924 |
09/02/2025 9:34 AM
Lt. Ben Harvey, Corvallis Police Department
(541) 766-6556 / benjamin.harvey@corvallisoregon.gov
Assault with Sword Leads to Arrest – August 30, 2025
On August 30, 2025, at approximately 4:26 a.m., Corvallis Police Department officers were dispatched to a residence in the 800 block of NW 23rd Street in Corvallis regarding a reported assault.
Responding officers determined that 29-year-old Corvallis resident Seth Amos Grace assaulted 31-year-old Keenan Simone-Ballantyne with a katana-style sword, causing a serious injury to Simone-Ballantyne’s leg. The incident occurred at Grace’s residence, where Grace, Simone-Ballantyne, and Grace’s girlfriend, Nicole Buck, had been drinking together.
The investigation also revealed that earlier in the evening, while walking to a store to purchase more alcohol, Grace punched Buck in the face during an argument, causing a broken nose.
At the conclusion of the investigation, Grace was arrested and lodged at the Benton County Jail on the following charges:
- Attempted Assault in the First Degree (ORS 163.185)
- Assault in the Second Degree (ORS 163.175)
- Unlawful Use of a Weapon (ORS 163.190)
- Assault in the Fourth Degree – Domestic Violence (ORS 163.160)
Simone-Ballantyne was transported by ambulance to Good Samaritan Regional Medical Center for treatment of his injuries. Buck was treated at the scene for her facial injury.
The Corvallis Police Department is continuing to investigate this incident. Anyone who may have information or witnessed the events is encouraged to contact Detective Derrick Samuels at 541-766-6924.