Serial killer BTK aka Dennis Rader

Rader was particularly known for sending taunting letters to police and newspapers. There were several communications from BTK from 1974 to 1979. The first was a letter that had been stashed in an engineering book in the Wichita Public Library in October 1974 that described in detail the killing of the Otero family in January of that year.

In early 1978, he sent another letter to television station KAKE in Wichita, claiming responsibility for the murders of the Oteros, Shirley Vian, Nancy Fox and another unidentified victim assumed to be Kathryn Bright (not identified because her brother survived and could have identified him). He suggested a number of possible names for himself, including the one that stuck: BTK. He demanded media attention in this second letter, and it was finally announced that Wichita did indeed have a serial killer at large. A poem was enclosed entitled "Oh! Death to Nancy," a botched version of the lyrics of the American folk song "Oh Death."

In 1979 he sent two identical packages, one to an intended victim who was not at home when he broke into her house and the other to KAKE. These featured another poem, "Oh Anna Why Didn't You Appear", a drawing of what he had intended to do to his victim, as well as some small items he had pilfered from Williams' home. Apparently, Rader had waited for several hours inside the home of Anna Williams, but left when she did not come home until later.

In 1988, after the murders of three members of the Fager family in Wichita, a letter was received from someone claiming to be the BTK killer in which he denied being the perpetrator of this crime. He did credit the killer with having done "admirable work". It was not proven until 2005 that this letter was in fact written by the genuine BTK killer (Rader), although he is not considered by police to have committed this crime

In March 2004, a series of 11 communications from BTK (Rader) to the local media led directly to his arrest in February 2005. The Wichita Eagle received a letter from someone using the return address Bill Thomas Killman.

The author of the letter claimed that he had murdered Vicki Wegerle on September 16, 1986, and enclosed photographs of the crime scene and a photocopy of her driver's license, which had been stolen at the time of the crime. Prior to this, it had not been definitively established that Wegerle was killed by BTK (Rader).

In May 2004, a word puzzle was received by KAKE. On June 9, 2004, a package was found taped to a stop sign at the corner of First and Kansas in Wichita, containing graphic descriptions of the Otero murders and a sketch labeled, "The Sexual Thrill Is My Bill." Also enclosed was a chapter list for a proposed book entitled "The BTK Story," which mimicked a story written in 1999 by Court TV (now truTV) crime writer David Lohr. Chapter One was entitled, "A Serial Killer Is Born.".

In July, a package was dropped into the return slot at the downtown public library containing more bizarre material, including the claim that he was responsible for the death of 19-year-old Jake Allen in Argonia, Kansas earlier that same month. This claim was found to be false and the death has been ruled a suicide.

In October 2004, a manila envelope was dropped into a UPS box in Wichita containing a series of cards with images of terror and bondage of children pasted on them. Also included was a poem threatening the life of lead investigator Lt. Ken Landwehr and a false autobiography containing many details about Rader's life. These details were later released to the public.

In December 2004, Wichita police received another package from the BTK killer. This time the package was found in Wichita's Murdock Park. It contained the driver's license of Nancy Fox, which was noted as stolen from the crime scene, as well as a doll that was symbolically bound at the hands and feet with a plastic bag tied over its head.

In January 2005, Rader attempted to leave a cereal box in the bed of a pickup truck at a Home Depot in Wichita, but the box was at first discarded by the owner. It was later retrieved from the trash after Rader himself asked what had become of it in a later message. Surveillance tape of the parking lot from that date revealed a distant figure driving a black Jeep Cherokee leaving the box in the pickup.

In February, more postcards were sent to KAKE, and another cereal box left at a rural location that contained another bound doll, apparently meant to symbolize the murder of 11-year-old Josephine Otero. In his letters to police, Rader asked if his writings, if put on a floppy disk, could be traced or not. The police answered his question via a newspaper ad posted in the Wichita Eagle saying it would be OK to use the disk.

On February 16, 2005 he sent a floppy disk to Fox TV station KSAS in Wichita. Forensic analysis quickly determined that the disk had been used by the Christ Lutheran Church in Wichita, as well as a reference to the name "Dennis". An internet search determined that a "Dennis Rader" was president of the church council. He was arrested on February 25.