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Skeletal remains discovered in Sac City, Iowa, basement

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SAC CITY, Iowa | Suspected human remains were found in a Sac City home on Monday, police said Tuesday.

The owner of a recently purchased property in the 600 block of North Fifth Street was cleaning the basement and found “what is believed to be skeletal remains,” Sac City police said in a statement.

The items were sent to the Iowa State Medical Examiner’s Office for an autopsy.

Sac County parcel records show Mark E. Koster as the previous homeowner.

Koster, then 58, was reported as a missing person in Sac City on July 4, 2009, according to the Iowa Missing Person Information Clearinghouse. He was last seen with a friend from Florida. He was legally declared dead by accidental or other violent means on Oct. 10, 2011.

Lesly Gehlsen, of Carroll, Iowa, bought the home in May, according to county records. Gehlsen did not immediately return a call seeking comment Tuesday.

A phone number listed at the home’s address has been disconnected, and efforts to find relatives of Koster were unsuccessful.

Police did not immediately return calls on Tuesday.

The case is under investigation, the police statement said.

Jody Ewing, whose website has details of Koster's case from public records, said she hopes the discovery will solve his disappearance.

"I hope for the family's sake they are Mark's remains," she said. "Then they can put what they have of him to rest."

Journal staff writer Molly Montag contributed to this report.


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