Dennis Lynn Rader (aka) BTK killer or the BTK strangler was an American serial killer who viciously murdered 10 people in Wichita, Kansas from 1974-1991. He was finally arrested in 2005 and is currently serving 10 consecutive life sentences at El Dorado Correctional Facility, with an earliest possible release date of February 26, 2180.
His moniker of BTK was also his method of killing-- Bind, Torture, and Kill.
After his intended victim failed to answer the door, Rader, posing as a private investigator followed a small child to his home and asked to speak to his mother. When Shirley Vian, a mother of three, came to the door Rader produced a gun and pushed his way into the home. After putting the children into the bathroom and tying a rope to the bathroom door so the children couldn't escape, Rader then proceeded to bind and strangle Shirley Vian as her children listened in horror. In a jail house confession Rader said had he not been interrupted he would have murdered the children as well.
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