2 PA Men Sentenced In Woman's Bombing Death

PITTSBURGH, PA — Two Clearfield County residents have been sentenced to life imprisonment following their convictions of conspiracy to maliciously destroy property by explosive or fire and possession of an unregistered destructive device.

The convictions were announced Wednesday by Troy Rivetti, the U.S. attorney for the Western District of Pennsylvania in Pittsburgh. They were in relation to a targeted bombing that killed Shanna Carlson, 34 who owed one of the defendants a drug debt.

U.S. District Judge Stephanie L. Haines imposed the sentences on Clint Addleman, 49, and Kris Nevling, 49. The defendants were found guilty of the crimes through separate jury trials in August 2025 (Nevling) and March 2026 (Addleman), with the jury also finding Addleman guilty of malicious destruction of property by explosive or fire resulting in death and conspiracy to distribute methamphetamine

“Clint Addleman and Kris Nevling callously took the life of Shanna Carlson—someone who Nevling later testified in court was among his best friends—in one of the most violent and brutal manners imaginable, all over a small drug debt,” Rivetti said in a statement. "(Wednesday's) sentencings ensure that Addleman and Nevling will both spend the rest of their lives in prison for their ruthless, violent conduct. "

The evidence presented during the trials established that, in and around early October 2019, Addleman and Nevling abuilt a bomb that was addressed and delivered to Carlson.

At approximately 4:30 a.m. on October 4, 2019, the package containing the bomb was delivered and left outside of the door to Carlson’s first floor apartment in a multi-unit rental property on East Market Street in Clearfield. Later that morning, the bomb detonated inside Carlson’s apartment, killing her and causing a fire that destroyed the building.

Trial evidence established that the victim owed Addleman an outstanding drug debt of approximately $1,000.