MISSOULA – A Spokane man who trafficked dangerous drugs while possessing firearms was sentenced yesterday to 200 months in prison to be followed by 5 years of supervised release, U.S. Attorney Kurt Alme said.
Thomas Anthony Biesiadecki, 30, pleaded guilty in September 2025 to one count of possession with intent to distribute controlled substances and one count of possession of a firearm in furtherance of a drug trafficking crime.
U.S. District Judge Dana L. Christensen presided.
The government alleged in court documents that several sources identified Biesiadecki as their major supplier of fentanyl. Sources stated they purchased thousands of fentanyl pills from him and one source said Biesiadecki would travel to Missoula from Spokane daily from January 2024 through the middle of summer 2024 to deliver fentanyl pills and powder. Another source stated they purchased fentanyl pills and methamphetamine from Biesiadecki in 2024. One source reported Biesiadecki traveled to Missoula and then Butte to trade drugs for firearms.
On May 16, 2025, Biesiadecki’s vehicle was searched in Spokane, Washington. Law enforcement officers located two firearms, fentanyl, methamphetamine, cocaine, and cash. Biesiadecki was interviewed and admitted to distributing drugs and trading drugs for firearms in the vehicle.
The U.S. Attorney’s Office prosecuted the case. The FBI's Montana Regional Violent Crime Task Force conducted the investigation.
This case is part of Operation Take Back America a nationwide initiative that marshals the full resources of the Department of Justice to repel the invasion of illegal immigration, achieve the total elimination of cartels and transnational criminal organizations (TCOs), and protect our communities from the perpetrators of violent crime.
XXX
Source: U.S. Attorney’s Office — Montana — U.S. Department of Justice press release.