♪ welcome back to "very scary people." btk, "bind, torture, kill," was the name he gave himself after confessing to the otero family murders. btk threatened he would kill again, but as time passed and there were no new victims, police wondered if he had moved on to torment another city -- until march 1977. ♪ singular: almost three years after he committed the kathryn bright murder, he has gone out again for a kill. again, the m.o. is slightly different here. morton: he targeted a house where there was two females, and he wanted to see if he could kill two females at the same time. he went there. they weren't home. he had another potential target. that one wasn't home. he was feeling very frustrated.