A Chicago man has been sentenced to eight years in prison after he pleaded guilty to drug-induced homicide for selling fentanyl-laced drugs that killed a 33-year-old Wonder Lake man.
Antoine Sullivan, 41, of Chicago, was charged in April 2022 with drug-induced homicide, a Class X felony.
A criminal complaint said Sullivan unlawfully delivered heroin and fentanyl to Jeffrey Nanstiel on February 16, 2022.
Prosecutors said Nanstiel and an acquaintance went to Chicago to purchase the drugs from Sullivan.
Nanstiel ingested the substances shortly after buying them and died, the complaint said.
According to an obituary, Nanstiel died at the age of 33 on February 17 at his home in Wonder Lake. The McHenry County Sheriff’s Office began investigating.
A forensic pathologist ruled that Nanstiel died from the adverse effects of heroin and fentanyl, court documents show.
The McHenry County Sheriff’s Office Narcotics Task Force communicated with Sullivan and organized a drug deal in April 2022.
Sullivan agreed to sell $500 of heroin to undercover officers, court documents show.
Sullivan arrived at the meeting place and was arrested by task force members as he tried fleeing while he was possessing multiple bags of heroin, prosecutors said.
He also had the phones he used to arrange the drug deal, court documents show.
One of the phones was used to coordinate the drug deal which led to Nanstiel’s death, prosecutors said.
Court records show Sullivan entered into a negotiated plea deal with the McHenry County State’s Attorney’s Office on September 27.
He pleaded guilty to one count of drug-induced homicide, a Class X felony, in exchange for being sentenced to eight years in the Illinois Department of Corrections. McHenry County Judge Tiffany Davis accepted the agreement.
Sullivan will serve the sentence at 75% in accordance with truth-in-sentencing guidelines and receive 146 days of credit for time served.
The state’s attorney’s office said they take this crime “very seriously.”
“And because of the combined efforts of the State’s Attorney’s Office and our local law enforcement, McHenry County has significantly lower overdoses than neighboring counties,” the state’s attorney’s office said.