• The daughter of the late Donald Dean Studey says her father killed and buried as many as 70 bodies on the rural tract where he lived.
  • Cadaver dogs on Oct. 21 indicated the possible presence of remains at the site, officials said.
  • Authorities are investigating for further evidence: “We’ve got to have more proof.”

DES MOINES, Iowa – Sheriff’s deputies and state officials are investigating an Iowa woman’s claim her late father was one of American’s most prolific serial killers.

According to his daughter, Donald Dean Studey murdered “five or six” women a year over several decades and buried them in and around an abandoned well on his property near Thurman, Fremont County Sheriff Kevin Aistrope told the Des Moines Register, part of the USA TODAY Network.

Thurman, population 167 as of the last U.S. Census, is a small city near the Iowa- Nebraska state line. Studey’s property is about 40 miles from Omaha, Nebraska, officials said.

On Oct. 21, two cadaver dogs took to the site had “hits” indicating the possible existence of decomposing remains in the area of the well, Aistrope said Monday.

“She’s got a hell of a story but we don’t have any proof of anything other than we had a cadaver dog hit,” Aistrope told the Register.  “We’ve got to have more proof than that.”

He said he has asked the Iowa Division of Criminal Investigation (DCI) for assistance.

“I’ll get with DCI and we’ll get a game plan here together, and this just adds … credibility to her story,” Aistrope said.

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State investigators said they are joining the investigation but claimed it is too early for them to comment on the case. “We are assisting, but it is in the infancy stages,” said Mitch Mortvedt, assistant director of the DCI.