WICHITA, Kan. (KSNW) — After searching the former property of serial killer Dennis Rader, deputies from Osage County, Oklahoma, authorities say there might be connections to other missing persons cases.

The Osage County Sheriff’s Office says the focus of Tuesday’s search in Park City was closely tied to the 1976 disappearance of Cynthia Dawn Kinney of Pawhuska, Oklahoma.

The Osage County Sheriff’s Office search in Park City on Tuesday, Aug. 22. 2023. (Osage County Sheriff’s Office Photo)

“This ongoing investigation has uncovered potential connections to other missing persons cases and unsolved murders in the Kansas and Missouri areas, which are possibly linked to Dennis Rader,” the sheriff’s office said. “The Osage County Sheriff’s Office has been working alongside the Kansas Bureau of Investigation (KBI), sharing crucial information and collaborating on this case.”

According to Osage County Sheriff Eddie Virden, this search was launched after deputies received a tip.

“We had developed some information that Dennis Rader had sent to someone describing where he had placed some items from some of his crimes that have never been found,” said Sheriff Virden. “Originally, at that spot, there was a storage building, and in 2006, our understanding, it was removed from the property along with everything else there. So there had been a building there prior, and when we obtained this information, which came out of a communication with a law enforcement person back years ago, he described having some trophies, souvenirs, and some victims’ driver’s licenses hidden in this location that weren’t found.”

Concrete was placed on Dennis Rader’s former property in Park City, Kansas, in 2020. Photo captured following property search on Aug. 22, 2023 (KSN Photo)

After talking with the KBI and Park City, the City assisted deputies in cutting and removing the concrete from the desired search areas.

“We found two different locations where objects had been buried. One of those had been – both of them were probably 14-16 inches under ground level,” said Sheriff Virden.

The first location appeared to include a makeshift time capsule made with a brick, composition shingle roofing, pebbles or stones, a shingle, and dirt.

The second location had been filled with a sand-type substance.

Deputies call what was found at Rader’s former residence as “items of interest,” saying they will undergo a thorough examination to determine the relevance to Kinney’s disappearance.

“We found some more personal-type items and maybe some more restraint-type items in those locations,” said Sheriff Virden.

This is the second time this year that deputies have been to Rader’s former residence. The first time was in April.

“So we initially went up, contacted Park City, showed them the information, went out and did a search. With our good fortune, the City in 2020 had poured a six-foot sidewalk over the top of the location we needed to look at,” said Sheriff Virden. “In that initial visit, we did some digging underneath the concrete from the side, and we found a pantyhose ligature that would be consistent to, you know, looking like the age and being what he was notorious for using.”

Sheriff Virden says that Rader has been cooperative with law enforcement.

“I have talked to Dennis several times. You know, Dennis, he has spoken with us. You know he’s pretty notorious for playing cat-and-mouse games.,” said Sheriff Virden.

Speaking of Rader, Osage County authorities said the serial killer is “a prime suspect in these unsolved cases, including the Cynthia Dawn Kinney case from Pawhuska.”

“The investigation is continuing, and you know we got other information of other locations that we plan on in the future. Again, we’re working with those other agencies and trying to mainly get the answers on our case, but if we have any help that can help anybody else on any of their unsolved cases, we hope to get that information to them and get some closure to other people as well as possible,” said Sheriff Virden.

Stay tuned to KSN for the latest.