He sold drugs that led to an overdose death. It will cost him his freedom.

A Michigan man will spend the rest of his life in prison for dealing drugs that killed a person and caused serious injuries to another.

Adam Dean Brown, 41, of Ypsilanti, Michigan, was found guilty during a trial in September 2019 of charges related to dealing drugs that led to an overdose death. He also previously pleaded guilty to two lesser charges, federal prosecutors said.

Last week, a federal judge sentenced him to life in prison.

Prosecutors say in October 2017, police responded to a home where a person was dead in the basement. There, police found a syringe and a packet of suspected heroin. But the substance was actually fentanyl.

Fentanyl is a powerful opioid that is often mixed with other drugs to enhance the effects, but a small dose can be deadly.

Investigators determined the victim bought the drugs from Brown, a previously convicted drug trafficker, prosecutors said.

Before police could arrest Brown, he sold drugs to another person. That victim also overdosed, but their mother called 911 and first responders were able to save that person’s life, according to prosecutors.