Theresa M. Stoen, 44, of Genoa City, Wisconsin, (left) and Mikalah M. Stoen, 25, of Richmond.

A mother and daughter have both pleaded guilty to hiding the body of a deceased man, who was a convicted sex offender, in a conservation area in Richmond.

Theresa M. Stoen, 44, of Genoa City, Wisconsin, and Mikalah M. Stoen, 25, of Richmond, were both indicted in June on two counts of concealment of a death, a Class 4 felony.

The McHenry County Conservation District Police Department responded around 8 a.m. on April 29, 2022, to the North Branch Conservation Area, 11500 North Keystone Road in Richmond.

McHenry County Conservation District Police Chief Laura King told Lake and McHenry County Scanner that a staff member reported finding a deceased male subject near the entrance to the conservation area.

There were no signs of apparent injury on the man and he did not have any identification on him, King said at the time.

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The McHenry County Sheriff’s Office, Richmond Police Department and Richmond Township Fire Protection District also responded to the scene and assisted with the investigation alongside the McHenry County Coroner’s Office.

Alexander Oleston, 32, of Richmond.

The man was identified as Alexander Oleston through investigative efforts.

State records show Oleston was a convicted child sex offender. He was 32 years old and a Richmond resident.

Oleston was convicted of aggravated criminal sexual abuse in Wisconsin when he was 21 and the victim was 14, records show.

The previous sex crime conviction against Oleston did not involve the two Stoens, King said.

Theresa Stoen and Mikalah Stoen, who are mother and daughter, told investigators they believed Oleston had died from a drug overdose.

It is unknown if he was dead at the time his body was transported to the conservation area.

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A grand jury indictment alleged that the Stoens transported Oleston’s body from an apartment in the 10600 block of North Main Street in Richmond the day before he was found.

The two defendants initially pleaded not guilty to the charges, court records show.

Mikalah Stoen on Friday entered into a blind plea agreement by pleading guilty to one of the two counts of concealment of a death. Theresa Stoen on Tuesday also entered into the same blind plea.

The charge is a Class 4 felony and carries a sentence of one to three years in the Illinois Department of Corrections but is probationable.

A sentencing hearing for Mikalah Stoen is scheduled for July 14. A sentencing hearing for Theresa Stoen is scheduled for July 25.