***Trigger Warning: disturbing images throughout***
Grim serial killer Dennis Rader, known as the BTK killer, could have more victims revealed by his sick drawings.
Dennis Rader gave himself the nickname BTK killer, as he admittedly bound, tortured, and killed his victims.
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The serial killer murdered 10 people over the course of three decades, before he confessed and was arrested in 2005.
For the first time ever, the disturbing drawings by Rader have been made public, as investigators believe he could be linked to the case of a missing woman.
In fact, law enforcement officials believe that the 78-year-old could be responsible for several unsolved cases.
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The BTK killer is currently the 'prime suspect' in the case of murdered teenager, Cynthia Kinney in Oklahoma.
The newly released drawings featuring barns and farms were recovered from the time of his arrest in 2005, and police officials are hoping that by releasing them, a member of the public will recognise one of the barns he drew and come forward.
Talking to CNN, Sheriff Virden said: "We’re hoping that releasing these, someone might recognise 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.
"Even if the barn’s not there anymore.
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"We would still like that information."
The sheriff also said that they had received an anonymous call months after Kinney disappeared, from a man who claimed her body could be found in an old barn, located along the Oklahoma-Kansas border.
Another drawing was linked to the disappearance of an unnamed woman in 1991, she can be seen wearing a green dress, bound with rope and sat on hay.
Communications between the killer's daughter and CNN revealed details about his deteriorating condition, whilst serving his maximum life sentence.
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Rawson, his daughter, said: "He has scoliosis very severe.
"He’s in a wheelchair, he has no teeth left, so he doesn’t even look like he has a jaw.
"He went from this like vivacious man that was hiking with me right before he was arrested, to like an elderly man, you know, his legs wrapped with like bandages."
A third sketch shows a female lying down in what investigators suspect to be a barn loft, tied to a staircase.
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The killer's daughter has been working very closely with investigators on her father's case.
Featured Image Credit: Sedgwick County Sheriff's Office via Getty / Larry W. Smith/AFP via GettyTopics: Crime, True Crime