DuPage County State’s Attorney Robert Berlin announced that a Glen Ellyn man charged with supplying a fatal dose of fentanyl to his girlfriend has been sentenced to seven and a half years in the Illinois Department of Corrections. Sergius Harty, 32 (d.o.b. 12/1/1992) appeared at his sentencing hearing where Judge Mia McPherson handed down the sentence. On June 10, 2025, Harty entered a plea of guilty to one count of Drug Induced Homicide, a Class X Felony. On August 19, 2022, Harty appeared in Bond Court where bond was set at $500,000 with 10% to apply. On September 7, 2022, Harty posted bond and was released from custody on GPS electronic monitoring.
On November 5, 2021, the DuPage County Sheriff’s Office responded to a call of an unresponsive female, later identified as twenty-nine-year-year-old Margaret McCabe of unincorporated Clarendon Hills. The call was placed by a family member. McCabe was immediately transported to a local hospital where she was pronounced deceased. An investigation into McCabe’s death found that she died of fentanyl intoxication. Through the course of their investigation, authorities learned that on November 4, 2021, McCabe traveled with Harty to Oak Park to purchase narcotics. Shortly after Harty purchased several bags of narcotics, he gave one bag containing fentanyl to McCabe. At home the next day, McCabe ingested the fentanyl given to her by Harty and subsequently passed away. On August 18, 2022, he was taken into custody pursuant to a previously issued warrant.
“While we have made progress in getting drug users the help they need, those who supply the drugs are an entirely different concern,” Berlin said. “A dealer, a friend or even a family member may have second thoughts about supplying this poison knowing that they will be looking at a significant amount of time behind bars if they are proved to be the source of a fatal overdose. Today’s sentence sends the message that in DuPage County we will not stand idly by while our family, friends and neighbors lose their lives to illegal narcotics. I thank DuPage County Sheriff James Mendrick and his team for their efforts on this case as well as Assistant State’s Attorneys Adam Frahm and Sara Henley not only for their work in holding Mr. Harty responsible for the death of Margaret McCabe, but also for their continued work in ridding our streets of illegal narcotics.”…