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RCMP sergeant details weapon search in Grand Forks manslaughter trial

The officer said police found no axe, hatchet or signs of struggle, while the defence pressed questions about weapons and forensic testing.

  • RCMP crime scene manager David Mackey testified on Monday in the manslaughter trial of Sean Tiessen, 47, who claims self-defence in the April 16, 2023, death of Joshua Lockwood, 33.
  • Police operated on information that Tiessen was "threatened or believed to be threatened with an axe or hatchet." Mackey noted there was no hatchet or axe in proximity to Lockwood when police arrived on scene.
  • Defence lawyer Paul McMurray questioned why police did not seize a hammer found at the scene, calling it a "potential weapon." Mackey explained investigators focused on the axe based on statements regarding the altercation.
  • Police tested the master bedroom lock to determine whether Tiessen could have secured himself inside. Mackey noted the bathroom appeared to be where the gun was "made ready to go."
  • During cross-examination, McMurray addressed substance use by Roberts and Lockwood. The trial continues Wednesday in Rossland Supreme Court.
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Tofino-Ucluelet Westerly News broke the news in Ucluelet, Canada on Wednesday, August 19, 2026.
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