BUTLER TWP — A Butler man is accused of selling fentanyl-laced heroin to another man who overdosed and died last fall at a Route 8 hotel.

Butler Township police Monday charged Joshua A. Hakeem, 30, with providing the drugs that ended in the death of 29-year-old John Kolakowski of Butler.

Hakeem, who is already in the Butler County Prison in violation of his probation in an unrelated case, was to be arraigned this morning.

He is charged with a top count of drug delivery resulting in death, a first-degree felony that carries a maximum sentence of 40 years in prison.

Additionally, he is charged with felony and misdemeanor drug possession, and involuntary manslaughter and reckless endangerment, both misdemeanors.

Authorities said Kolakowski was found dead shortly before 1 p.m. Oct. 19, 2015, in a room at the Days Inn.

Police were called and found empty stamp bags of suspected heroin and a syringe in the room. There were no injuries or other trauma on the body to suggest foul play.

Butler County Deputy Coroner Larry Barr pronounced Kolakowski dead at the scene.

An autopsy later determined Kolakowski died of combined heroin and fentanyl toxicity, said Butler Township Police Chief John Hays.

The labor-intensive investigation, Hays explained, was a primary reason it took so long to file charges. Police also had to wait for the results of autopsy and toxicology tests and review their findings with the district attorney’s office.