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Arrest Made in Fatal Manchester Stabbing That Killed 35-Year-Old Londonderry Man

An autopsy found a chest stab wound and officials say it is New Hampshire’s first homicide of 2026.

Overview

  • The New Hampshire Attorney General’s Office said 32-year-old Mark Delisle is charged with second-degree murder.
  • The victim was identified as 35-year-old Yan Leek of Londonderry.
  • Police and fire crews responded around 9:15 p.m. Tuesday to Barry Avenue and Spruce Street, where Leek was found on the ground with a chest wound.
  • He was taken to Elliot Hospital, where he was pronounced dead.
  • Delisle is scheduled to be arraigned Thursday in Manchester, and investigators say the case remains active with a request for public tips.