Kandis S. Rinn, 45, of Marengo.

A woman was sentenced to over three years in prison after prosecutors say she tried to kill her adult son when she stabbed him, leaving him seriously wounded, near Marengo.

Kandis S. Rinn, 45, of Marengo, was initially charged in February 2021 with aggravated domestic battery, a Class 2 felony, and aggravated battery using a deadly weapon, a Class 3 felony.

A grand jury later indicted Rinn on an additional charge of attempted murder, a Class X felony.

McHenry County Sheriff’s Deputy Tim Creighton said at the time that sheriff’s deputies responded to Rinn’s residence in the 19000 block of Ridge Lane in unincorporated Marengo on February 21, 2021.

A domestic incident between Rinn and her adult son escalated when Rinn stabbed the man with a knife, Creighton said.

A grand jury indictment said that Rinn “performed a substantial step towards the commission” of murder when she stabbed the victim with the alleged intent to kill him.

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The victim was treated by paramedics and flown by medical helicopter to Javon Bea Hospital in Rockford with serious injuries.

The man suffered a puncture wound that required staples to close and surgery, the indictment said.

Police believed alcohol was a factor and they said it was an “isolated incident.”

Deputies arrested Rinn and transported her to the McHenry County Jail

Rinn has remained in custody since her arrest. She entered into a negotiated plea deal on Wednesday.

Rinn pleaded guilty to one count of aggravated domestic battery, a Class 2 felony, in exchange for her other charges being dismissed.

McHenry County Judge Michael Coppedge approved the plea deal and sentenced Rinn to 42 months in the Illinois Department of Corrections.

Rinn’s bond was revoked following the plea and she was taken into the custody of the McHenry County Jail to await transport to a state prison.

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