From 1974 to 1991, he killed 10 people. She is known as BTK Killer, which means "bind, torture, kill". He sent letters to the police and local media and sent the video to the flop by writing the assassination.
He used to kill his victims until he lost his knowledge, and when his victim returned to his knowledge, he started to die again.
He is caught by a deleted file from a floppy disk he sent. He was arrested in 2005 and sent to jail for life time.
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From @mahfu