Jose M. Perez, 61, of Chicago.

A Chicago man was sentenced to six years in prison for the death of an Algonquin woman, who died from a cocaine overdose in 2019, prosecutors said.

Jose M. Perez, 61, of the 4300 block of North Monticello Avenue in Chicago, was charged with one count of drug-induced homicide, a Class X felony.

Perez entered into a negotiated plea deal with the McHenry County State’s Attorney’s Office.

Perez pleaded guilty to one count of drug-induced homicide, a Class X felony.

McHenry County Judge Michael Coppedge sentenced Perez on Thursday to six years in the Illinois Department of Corrections, court records show.

He will be required to serve 75% of his sentence under truth-in-sentencing guidelines.

The Illinois State Police North Central Narcotics Task Force began an investigation after 57-year-old Barbara M. Duelfer was found dead at her residence in the 100 block of Jefferson Street in Algonquin.

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A motion filed in court says that Duelfer’s boyfriend, 61-year-old Gregory B. Galluzzo, told police that he and Duelfer went to Chicago and purchased cocaine on June 15, 2019.

Galluzzo and Duelfer went back to their Algonquin residence and proceeded to drink alcohol and ingest cocaine into the early morning hours of June 16, 2019, according to the motion.

Duelfer was pronounced dead and the McHenry County Coroner’s Office ruled her cause of death was from adverse effects of cocaine.

Gregory B. Galluzzo, 61, of Algonquin.

Galluzzo was arrested on September 14, 2019, by the Algonquin Police Department and charged with drug-induced homicide.

On February 5, 2020, Galluzzo told investigators with the Illinois State Police North Central Narcotics Task Force that Perez was the person who sold him the cocaine that caused his girlfriend’s death.

A warrant was issued for Perez and he was taken into custody on March 12, 2020.

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Prosecutors offered Galluzzo a plea deal in early 2020. His original charges were dismissed and he pleaded guilty to a lesser charge of unlawful delivery of a controlled substance.

Galluzzo was sentenced to two years of probation and $3,760 in court fines and fees. He was also required to undergo alcohol and drug addiction treatment.

Prosecutors credited Galluzzo 180 days in jail for the time he already served.

Perez remains held in the McHenry County Jail awaiting transfer to a state prison, jail records show.