Last week the men told authorities their mother and sister could be buried there.
The bodies have not yet been identified. An autopsy will be done tomorrow, police said.
Police held the press conference Saturday afternoon away from home.
No charges have been filed so far, but that could change once the autopsy is done. Concealing a death is a Class 4 felony in Illinois.
Police said the brothers were released two hours after undergoing a mental review last week. The city had been paying for his stay in a hotel while the investigation continues.
The investigation began after the water company alerted police that no water had been used at the 3900 block of Center Avenue. The use of gas and electricity had also been minimal.
Upon arrival they found a serious case of hoarding. The house contained jars full of urine and piles of possessions along the two-story house, as well as several cats and dogs running around the property.
“It was several liters of urine,” said Thomas Herion, Lyon’s police chief. “There were no toilets in operation. All the rooms, the front door and the back door were completely barricaded with rubbish, boxes.”
Several dogs were taken in by the Animal Humane Society, police said Saturday.
Some neighbors said they always thought the siblings, who were almost left alone, were a little weird.
“We’ve known for a long time that something is going on,” said neighbor Brian King. “I’m sorry people because there have been if you want to say medical problems to the boys.”
The brothers told police their mother was pushed down the stairs by her sister in December 2015 and died the following week from a head injury. Police said he was about 70 years old. The brothers said their sisters fell ill and died in 2019. Police said he was 42 years old.
“Where are they? He indicated they were buried in the backyard, he said, ‘Oh, they got sick, they died, and we buried them in the backyard,'” Herion said.
The state of Illinois has no record of his death. Police said all evidence indicates the bodies were in the yard; they have no evidence that their mother is in Connecticut or that the sister is with another family.
The siblings said his father had died in 2012 and that he had been cremated.
Police said they provided additional help, including an archaeologist, for the extremely tedious task of emptying the house and looking for evidence of what happened inside and sifting the dirt in the outside courtyard.
“We will have to bring in expert crews to empty this residence,” Chief Herion said. “We will have detectives outside as items come out of the house. Each test will need to be evaluated as read and determine if it is valuable or not.”
The Lyon police department is collaborating with the Cook County state attorney to initiate an investigation.
Police said they are currently treating this as a homicide investigation, but warned the brothers could tell the truth.
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