he says, i got mr. otero a pillow. before i strangled mr. otero. >> tried to make mr. as i could. apparently he had a cracked rib from a car accident, so i had him put a pillow down for his head -- >> i was kind to him before i killed him? >> that's right. that massive disconnect comes in. and you realize, my god, my father's a psychopath. >> reporter: later at his sentencing, the killer confronted by his victims' family members. >> the last 5,326 days i have wondered what it would be like to confront the walking cesspool that took my mother's precious life. >> reporter: then he was allowed to address the court. >> thanks. i can't believe the people got me on this. you have to appreciate the police department. they've done a lot of work. i hope i pronounce these people's last names right. if i leave somebody else, i apologize for that -- >> the families got up. turned around and walked out the door. >> he's thanking the police. he basically said my family were pawns in his game in social context. >> reporter: the judge condemning rader to ten life sentences, the harshe

. >> he say that is he spotted mrs. oterodaughters when he was driving my mom to work and then stalked their family. >> he saw it was a corner house, just kinda everything about it attracted him. >> the oteros were a relatively new family to wichita. they're a family of seven, five kids or various ages. and the older kids had gone off to school that day -- leaving the two younger ones at home with their parents. >> my name is charlie otero and i am the son of joseph and julie otero. my father was a really outgoing jovial kind of guy. and my mom, a very caring, loving catholic woman. she was a mother first. >> dense rader went to the house. he cut the phone line. and then he entered the house. >> dennis rader, believed that the mother and the daughter would be the only ones home. he was not expecting mr. otero to be there. >> he was really taken by surprise that four people were there, that he now had to deal with. >> he pulled a gun on them. >> he tied up mrs. otero and then he started to strangle mr. otero. >> he wanted that