BTK Killer.

On January 15, 1974 in Wichita, Kansas Joseph Otero, Julie Otero, and their two siblings Josephine and Joseph II strangled to death in their home. Joseph was found lying face down on the floor with his hands and feet bound with a cord that had been ripped from a Venetian blind from one of the rooms. Julie was found in the bedroom, lying on the bed, bound in a similar manner. Both appeared to have been strangled …

…been abducted from her home, strangled, and her body transported and dumped in the remote rural area. The police concluded that the BTK Killer was the most likely suspect. Almost 20 years after the first murder, the BTK Killer was still at work, leading police to the assumption that this serial killer could obviously take off for years on end and resume killing on a whim. A "part-time serial killer" would be very difficult to apprehend.