>> that's him being interviewed by a local tv station, the killer himself right there on the screen for all wichita to see. who would ever suspect this public servant was actually the monster btk, whom everyone feared? but it was in that job that at least some people saw a darker side to dennis rader. dee stewart, a longtime acquaintance of rader's, has a good friend who reported to him in the compliance department. this friend, she says, found him controlling, and belligerent. >> there were times when he yelled at her in front of other employees. he demeaned her. he told her she would never be as smart as he was. >> but she says he could turn his good and bad sides on and off. >> he could be berating her, he could be screaming at her. and if the phone rang and it was a member of his family, he turned into ward cleaver. >> dr. fox says this apparent jekyll and hyde personality is classic for many serial killers. >> i don't believe there are two raders in one body. it's just that we all have a