“We’re hoping that releasing these, someone might recognize one of these barns or the unique features in them, or the closeness of the silo to the barn or possibly might have even found items that they didn’t know why were there that could be very important in this case,” Osage County Sheriff Eddie Virden told CNN.

“Even if the barn’s not there anymore, we would still like that information.”

As CrimeOnline previously reported, Kansas police found additional evidence earlier this month while searching Rader’s former Park City, Kansas, home. Virden said some old Polaroid images taken by Rader before his arrest mirror the positions Rader placed his victims in. The photos also reportedly showed clothing he wore during some shots.

For months, investigators had been considering a potential link between Rader and the 1976 disappearance of Cynthia “Cindy” Kinney, 16. He’s also a person of interest in several cases out of Kansas, Missouri, and Oklahoma.

Following Kinney’s disappearance, an unidentified man called police and asserted that the teenager’s remains might be located in an aged barn situated along the border of Oklahoma and Kansas, Virden said.

Investigators located the deputy who handled the call back then, but the barn’s whereabouts remain shrouded in mystery.

Virden added that investigators seized communications from the killer in prison, which may have indicated that there could be other hidden items in the barns. Rader’s daughter, Kerri Rawson, told CNN that her father loved barns and silos, and did a lot of drafting and sketching in his free time.

“My father did drafting at our house, he drew up plans for the gardens,” she said. “And my dad needed to always be outside and be in the air and winter was hard for him…And so we had to find things for him to do because when he got inside and he was too cooped up, he would get all angry.”

The drawings show black sketched pipes running through a barn wall, Virden pointed out.

“The reason you would have that is if you were moving livestock through there, that those bars would keep the livestock from hitting probably the tin or the wood on the outside of the barn so that if an animal hit it, you know, they wouldn’t go through and dent up the tin or knock the wood off the outside,” he explained.

Meanwhile,  a friend of Kinney’s, who heard Rader could possibly be connected to her disappearance, still remember the incident vividly, despite the case being nearly 50 years old.

“My friends and I drove around for years and years and years after that, every back road, every lake road, every oil lease, trying to find her, trying to find anything out of the ordinary,” Kinney’s friend, Tjuana Boulanger, told 12 News. “We just wanted to find Cindy and we just never had any luck.”

In 2005, police arrested Rader, years after he eluded and taunted investigators and the media. His trail of digital evidence is what eventually helped police capture him. He then nicknamed himself “BTK.” which stands for “bind, torture, kill.”

Rader is now serving 10 consecutive life sentences for the deaths of 10 people between 1974 to 1991.

The story is developing. Check back for updates.

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[Feature Photo: FILE – In this Oct. 12, 2005, file photo, convicted BTK killer Dennis Rader listens during a court proceeding in El Dorado, Kan. A new book says the BTK serial killer planned to kill an 11th victim by hanging her upside down in her Wichita, Kansas, home. It’s a story police heard from Dennis Rader himself in 2005, but decided at the time to suppress to protect the woman. The story was made public in “Confession of a Serial Killer: The Untold Story of Dennis Rader, the BTK Killer,” which has a scheduled release date of Sept. 6. (Travis Heying/The Wichita Eagle via AP, Pool)]