In October 1974, Rader left a chilling letter inside a library book, confessing to the Otero family murders. The note, written in a hasty and poorly constructed manner, offered authorities some insight into the mind of the culprit. Local newspapers picked up on the story, and it marked the beginning of the unsettling BTK saga. In the letter, Rader ominously declared, "It's hard to control myself. You probably label me as 'psychotic with sexual perversion hang-ups.'" He went on to issue a grim warning that he would strike again, stating, "The code words for me will be bind them, torture them, kill them, B.T.K." Those initials became his infamous moniker, with variations like the BTK Killer or simply BTK.

During his business trips, Rader would throw what he called "motel parties," and he was the only guest. He'd deck himself out in women's lingerie, often swiped from his victims, then he'd tie himself up, self-asphyxiate using plastic bags, all while perusing his creepy collection of ads and mementos he'd taken from his victims' homes. He has remarked that he'd rather have a partner involved in these sinister fantasies, but he didn't want to drag his wife into his dark world. So, he'd play out these disturbing scenarios on himself and imagine he was his own female victim.

Rope was always a part of Rader's ‘kit’, which included breaking and entering tools, cords, tape, hoods, knives, plastic bags, and a gun. He would carry these kits with him so he would be prepared for his next 'project,' which is what he called his potential victims. He would refer to a murder as a 'hit' and he called the process of killing someone 'putting them down.'

When investigators eventually searched Rader's house, they stumbled upon chains that appeared to be used for bondage purposes, accompanied by C-clips that serve to shorten chains or secure a person's legs or feet.

On the heels of Rader's arrest, Oklahoma investigators came across a pantyhose ligature on Rader's property The ligature was knotted in a manner consistent with binding someone's hands or feet.

Radar was so obsessed with women, that he would meticulously cut out images of women from magazine advertisements. He would then embellish these pictures by drawing ties and gags on them before affixing them to cards that he kept on his person.

Rader grew increasingly frustrated by the lack of public attention. In December, BTK made a call to a 7-11 store and left instructions on a cereal box of Post Toasties from 2005, directing authorities to a package hidden in Murdock Park. However, the police were initially unable to locate it. It wasn't until a week later that a passerby stumbled upon it while walking through the park. Inside the package, they discovered various items, with the most peculiar being a PJ doll dating back to the years 1969-1985. The doll had a bag covering its head and its hands and feet were bound with pantyhose.

Early in 2005, there were five communications starting from January 8. One of the most notable incidents involved a Post Toasties cereal box, which had been weighed down with a brick and propped against a road sign in a rural area. There were also requests to place ads in the local newspaper for communication purposes. Additionally, a postcard was sent with the recipient's name as 'Happ Kakemann,' referring to a character that had appeared on KAKE-TV in the 1970s.

Rader couldn't get enough attention, and in a subsequent message to the police, Rader posed a question, asking if he could communicate using a floppy disk without being traced to a computer. He urged them to be honest and instructed them to place an advertisement in The Wichita Eagle with the message, "Rex, it will be OK." Two weeks later, a disk arrived in a package sent to KSAS-TV, containing a file with instructions for detectives regarding further communication. What Rader failed to realize was that the disk also contained encrypted metadata, which would ultimately lead the police straight to him.

The disk was entrusted to an officer who was an expert in computer technology. Utilizing forensic software, he unearthed deleted files and concealed data, revealing the disk's history, including its last modification, time, and location. This information disclosed that the disk had been used on a computer at Wichita's Christ Lutheran Church by a user identified as "Dennis" (Rader was the president of the church council). A quick check of the church's website confirmed "Dennis Rader" as the president of the congregation. With this lead, the police located his home address and observed a black Jeep Cherokee in his driveway.

Out of the whole tarot deck, the Hanging Man card is definitely a shoe-in for Rader, seeing as this is one of hi favorite poses.

Rader identified a 25-year-old potential victim when he observed her entering her Wichita residence. He began stalking her, and on December 8, 1977, he approached her door. When there was no response, he severed the phone lines and forcibly entered her home, waiting for her in the kitchen. Rader later described her murder as a "perfect hit." Despite some initial verbal resistance, the victim eventually cooperated and did not resist. Rader felt he had complete control over her, which made it, in his words, "one of the more enjoyable kills."

Using his belt, Rader strangled the victim on her bed, and before her death, he confessed to being responsible for earlier murders. The following day, he made a phone call to the police from a booth, informing them that they would discover her lifeless body at her residence.

The flag features a blue sun from which red and white rays radiate. Blue was selected for the sun as it represents contentment and happiness. The red and white rays suggest freedom; paths to come and go as you please. The white symbol, emblazoned across the sun, is an Indian symbol for home.

Besides being a cold-blooded murderer, Rader had an obsession with cross-dressing, and re-enacting his 'hits' wearing his victims clothes. He would often finishe these ensembles with some of the oddest creepiest looking masks know to man. This one is especially haunting, and we tried our best to repiicate it on his page.

Rader’s narcissism is so off the charts, that his letter to detectives started like this: “How many people do I have to kill before I get my name in the paper or some national attention?”