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.
other than strangulation in the first and the third, it just doesn t seem that the same person would be responsible for all three attacks. otis: however, the binding of the victim on her legs and her arms are what keyed the police department in to matching that one to the otero case. the knots were the same. the rope was kind of the same. so that one was lumped into the btk cases at that point. relph: we knew of m.o., but certainly, we hadn t come to appreciate what s called signatures, things that a killer does just for themselves. certainly, some of the binding of some of his victims was just for him. it didn t further the completion of the crime. otis: i believed this guy had to be just as smart as us when it came to ways to catch him fingerprints and hairs and fibers because he was being very, very careful not to give us any. jordan: with this third attack, it wasn t well-planned.