(Sioux City) A former Carroll County paramedic who tampered with vials of narcotic pain medication was sentenced on February 17, 2026, to more than two years in federal prison. Teresa Marie Johnson, age 53, from Manilla, Iowa, received the prison term after an October 5, 2025, guilty plea to one count of tampering with a consumer product.
Johnson was a licensed paramedic who took fentanyl from her employer, a county ambulance service. The ambulance service used the fentanyl to alleviate the serious pain that patients were suffering in car accidents and other emergencies. Beginning in late 2024, Johnson tampered with the ambulance service’s fentanyl stocks on three occasions in order to take it for her own use. After investigators analyzed one of Johnson’s tampered vials from the county ambulance service’s inventory, they discovered it contained only 9.6% of its declared value of fentanyl. They also reported evidence of an adhesive-like material on the flip-off cap, vial crimp and top stopper surface, at least two punctures on the bottom stopper surface, and other breaches to the vial. One of Johnson’s fellow paramedics reported occasions when medication was administered “and the desired response did not happen.”
Before committing her tampering crime, Johnson had a criminal history. Johnson has five prior misdemeanor theft convictions in state court. She also received a deferred judgment in state court after pleading guilty to a felony forgery crime. As a part of her plea agreement, Johnson agreed to forfeit her State of Iowa paramedic license to the United States.
Johnson was sentenced to 30 months’ imprisonment and fined $5,000. She was also ordered to repay $6,000 in court-appointed attorney fees and costs. Johnson must also serve a two-year term of supervised release after the prison term. There is no parole in the federal system.
