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Raw Data: BTK Timeline

A timeline from 1974 to present surrounding the BTK case:

— Jan. 15, 1974: Joseph Otero, 38, and his wife, Julie, 34, are strangled in their home along with two of their children, Josephine, 11, and Joseph II, 9.

— April 4, 1974: Kathryn Bright, 21, is stabbed to death in her home. Police later conclude she was a BTK victim.

— October 1974: The Wichita Eagle-Beacon gets a letter from someone taking responsibility for the Otero family killing and including crime scene details.

— March 17, 1977: Shirley Vian, 24, is found tied up and strangled at her home.

— Dec. 8, 1977: Nancy Fox, 25, is found tied up and strangled in her home. The killer's voice is captured on tape when he calls a dispatcher to report the crime.

— Jan. 31, 1978: A poem referring to the Vian killing is sent to The Wichita Eagle-Beacon.

— Feb. 10, 1978: A letter from BTK is sent to KAKE-TV claiming responsibility for the deaths of Vian and Fox, as well as another unnamed victim. Police Chief Richard LaMunyon announces a serial killer is at large and has threatened to strike again.

— Aug. 15, 1979: Police get more than 100 tips in the first day of radio and TV broadcasts that repeat the voice of the BTK strangler from the 1977 recording.

— April 28, 1979: BTK waits inside a home, but leaves before the 63-year-old woman who lives there returns. He later sends her a letter letting her know he was there.

— Sept. 16, 1986: Vicki Wegerle, 28, is strangled in her home.

— March 19, 2004: A letter arrives at The Wichita Eagle containing a photocopy of Wegerle's driver's license and photos of her body. Police link it to BTK.

— Feb. 26, 2005: After receiving several more letters, authorities announce the arrest of BTK.