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2 Pennsylvania Men Get Life in Prison for Mailing Bomb that Killed Woman over Drug Debt

Prosecutors said the pair mailed a bomb over a $1,000 drug debt, and federal investigators spent six years solving the case.

  • On Wednesday, a federal judge sentenced Clint Addleman and Kris Nevling to life in prison for the 2019 fatal mail bombing of Shanna Carlson in Clearfield, Pennsylvania.
  • A $1,000 drug debt owed to Addleman prompted the two men to build and mail a bomb that detonated outside Carlson's apartment on October 4, 2019.
  • ATF Pittsburgh Resident Agent in Charge Bill Isbir called the investigation a 'whodunit,' requiring collaboration between the ATF, Clearfield Regional Police Department, Pennsylvania State Police, and Allegheny County Sheriff.
  • United States Attorney Troy Rivetti labeled the killing 'brutal,' while Eric DeGree, special agent in charge of the ATF Philadelphia Field Division, called the pair 'brutal murderers.'
  • Two separate juries convicted the men after a six-year investigation, with Isbir stating the agency wants to 'put our fingerprint' on cases to ensure community safety.
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WTAJ News broke the news on Wednesday, July 22, 2026.
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