Jose M. Perez, 59, of Chicago.

A second man has been charged in connection with the cocaine overdose death of an Algonquin woman in 2019.

Jose M. Perez, 59, of the 4300 block of North Monticello Avenue in Chicago, was charged with one count of drug-induced homicide, a Class X felony.

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

A motion filed in court says that Duelfer’s boyfriend, 59-year-old Gregory B. Galluzzo, told police that he and Duelfer went to Chicago and purchased cocaine on June 15.

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, according to the motion.

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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, 59, of Algonquin.

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

On February 5, 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.

Prosecutors offered Galluzzo a plea deal on February 7. 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 will be required to undergo alcohol and drug addiction treatment.

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

Perez remains held in the McHenry County Jail on a $500,000 bond. He is scheduled to appear in court again on March 31.