Dennis Rader kept journals, drawings, photos and even materials he had collected from each of his victims hidden around his home.

Detectives connected a floppy disk sent by the killer to a computer registered to someone named Dennis at Christ Lutheran Church, and DNA from one of the murders helped confirm BTK was Dennis Rader.

After an article was published on the 30-year anniversary of the start of the BTK killings, Dennis Rader sent a letter to the Wichita Eagle under the name Bill Thomas Killman.

"Most of the time he was even keel and kind and warm," Kerri Rawson told "20/20." "At times he could be very firm or have flashes of anger or outbursts you weren't expecting."

Kerri Rawson said her mother was three months pregnant with her when her father Dennis Rader, the BTK killer, murdered a young woman

Charlie Otero was 15 years old the day his parents and two of his siblings were murdered by the notorious BTK serial killer.

Kerri Rawson told "20/20" that, on Feb. 25, 2005, the FBI arrived at her home to tell her that her father Dennis Rader had been arrested and identified as the BTK serial killer.

The thieves allegedly made off with more than $300,000 in cash and jewelry.

Radio station K-EARTH 101 FM campaigned for John Adams Middle School to make the change.

The company thanked a 14-year-old who first discovered the bug and brought it to Apple's attention.

Kerri Rawson was 26 when she learned that her father was responsible for the torture and murder of 10 people.

The down escalator suddenly sped up as fans were leaving the KFC Yum Center.

Video showed the man, who was arrested and charged, appearing to dump ice at his job and then shuffling toward the ice, police said.

All five vets come from different branches of the military.

"We want to make sure everyone is safe when they come down and that takes a lot of communication and a lot of planning," said deputy chief Scott Kreher of Atlanta's police department.

Retired Navy Capt. Rosemary Mariner was the service's first female jet pilot.

Surveillance footage shows bear making off with a large bag of dog food in its mouth after a late night visit to a Florida home.

The man didn't come to work, prompting his co-workers to call authorities to respond to his home in Cudahy, about 7 miles outside Milwaukee.

Over 3 feet of lake effect snow swept across parts of New York as the winter arctic blast continues to pound the Northeast

The suspect's mother filed a police report in which she alleges that her son took $36,000 from her for tickets she never received.

The family of the "Empire" star said: "This was a racial and homophobic hate crime."

At least six detainees in ICE custody and on a hunger strike in Texas are being force-fed.

Seals inhabit a Northern California beach closed due to the partial government shutdown and now show no signs of leaving.

A judge in New York cleared the way for a $2.50 surcharge to be added to a taxi fare. An extra $2.75 will be added to the cost of Uber, Lyft and other for-hire rides.

Casey Hathaway, 3, was found two days after he disappeared.

RT @KerriRawson: My dad, serial killer, Dennis Rader, calls Gilgo Beach suspect Rex Heuermann a ‘clone’ of himself “BTK and Heuermann wer…

RT @KerriRawson: My dad, serial killer, Dennis Rader, calls Gilgo Beach suspect Rex Heuermann a ‘clone’ of himself “BTK and Heuermann wer…

RT @KerriRawson: My dad, serial killer, Dennis Rader, calls Gilgo Beach suspect Rex Heuermann a ‘clone’ of himself “BTK and Heuermann wer…

RT @KerriRawson: My dad, serial killer, Dennis Rader, calls Gilgo Beach suspect Rex Heuermann a ‘clone’ of himself “BTK and Heuermann wer…

RT @KerriRawson: My dad, serial killer, Dennis Rader, calls Gilgo Beach suspect Rex Heuermann a ‘clone’ of himself “BTK and Heuermann wer…

RT @KerriRawson: My dad, serial killer, Dennis Rader, calls Gilgo Beach suspect Rex Heuermann a ‘clone’ of himself “BTK and Heuermann wer…

RT @NancyGrace: ‘I was correct’: #BTK #SerialKiller Calls Accused #LISK #RexHeuermann a Copycat Clone https://t.co/Fox0c216Us via @crimeonl…

RT @KerriRawson: My dad, serial killer, Dennis Rader, calls Gilgo Beach suspect Rex Heuermann a ‘clone’ of himself “BTK and Heuermann wer…

RT @NataliaAntonova: It’s like saying, “Well, you know, the BTK killer has some ideas worth listening to.” Bizarre to be sharing a realit…

The BTK (Bind Torture Kill) Killer was a Boy Scout

RT @NataliaAntonova: It’s like saying, “Well, you know, the BTK killer has some ideas worth listening to.” Bizarre to be sharing a realit…

RT @NataliaAntonova: It’s like saying, “Well, you know, the BTK killer has some ideas worth listening to.” Bizarre to be sharing a realit…

RT @NataliaAntonova: It’s like saying, “Well, you know, the BTK killer has some ideas worth listening to.” Bizarre to be sharing a realit…

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

I’ve seen this daughter of BTK so many times on tv. How they feel as child of serial killer. I can’t think of seeing any of the victims or victim’s family ever!

RT @MrsStinkFingers: Dear @CNN, why do you say #RexHeuermann is an "unlikely suspect" in the #GilgoBeach #LongIsland murders? Is it becau…

RT @ronniebee3: Dennis Rader (BTK killer) That sick mofo was a family man, govt worker & a church deacon but enjoyed binding, torturing an…

Wife: that song they were playing in the store, that was BTK? Me: ....BTS?? Wife: ohhhh right BTK is a serial killer, my bad

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

RT @ronniebee3: Dennis Rader (BTK killer) That sick mofo was a family man, govt worker & a church deacon but enjoyed binding, torturing an…

Dennis Rader (BTK killer) That sick mofo was a family man, govt worker & a church deacon but enjoyed binding, torturing and killing women He would send letters to the police, baba was enjoying the clout till they traced a disk he sent to his church computer https://t.co/EyRvi0QZFL

BTK Killer presents the same problem as ATM Machine

RT @MrsStinkFingers: Dear @CNN, why do you say #RexHeuermann is an "unlikely suspect" in the #GilgoBeach #LongIsland murders? Is it becau…

Inside the Mind of BTK: The True Story Behind the Thirty-Year Hunt for the Notorious Wichita Serial Killer R4XJZQ7 https://t.co/WzckmqeH4i

RT @MrsStinkFingers: Dear @CNN, why do you say #RexHeuermann is an "unlikely suspect" in the #GilgoBeach #LongIsland murders? Is it becau…

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

It's actually common for serial killers to be married. That's how they hide in plain sight. The BTK Killer is a prime example. In Gilgo Beach Slayings, a Wife Nearby but Apparently Unknowing https://t.co/SGqsAWjzxd via @Yahoo

RT @SugarMurder: @bstewart_1983 @901Lulu Ever heard of BTK? Green River Killer? Keith Jesperson? Puhleeeze! @KerriRawson https://t.co/jLY…

RT @KerriRawson: Deep Dive here, New! BTK Killer’s daughter sympathises with Gilgo Beach suspect’s family Shelia Flynn | The Independen…

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

BTK killer would see Idaho suspect Bryan Kohberger as ‘weak loser’ after link between two men, criminologist says https://t.co/vqnH0NV7YS

BTK killer would see Idaho suspect Bryan Kohberger as ‘weak loser’ after link between two men, criminologist says https://t.co/vqnH0NV7YS

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

RT @EVargasTV: How could the family of the accused Long Island Serial killer not have known or suspected anything? The daughter of the BTK…

RT @DocBonn: The Capture of Serial Killer Dennis Rader, BTK | Psychology Today https://t.co/cc0L8ZXz5y