Rader’s first victims were four members of the Otero family whom he killed on January 15, 1974. The BTK Killer murdered them by strangulation using a cord used in Venetian blinds, the New York ...

Police later conclude she was a BTK victim. ¢ Oct. 22, 1974: The Wichita Eagle-Beacon gets a letter from someone taking responsibility for the Otero family killing and including crime scene details.