mccrary: paul bernardo is our worst nightmare.neering, and astute enough to get away with this for a long-enough period of time. he was able to hide his true personality beneath this glowing face of a blonde-haired, blue-eyed boy next door, but deep down inside, what was growing was an anger towards women. paul's family was a little tumultuous. garofalo: he came from a very troubled family. his father was a convicted molester. sacks: and what paul found out at 16 was that this father that he thought was his father wasn't actually his father at all. that he was actually the product of an affair, and that really made him snap. mccrary: he apparently went ballistic. it made him very angry at his mother. you could certainly see how that hatred then would then be transferred onto these other female victims. and he, you know, went down a very dark path. paul hunter: bernardo was a voyeur. he was caught outside women's bedrooms in scarborough, looking in. mccrary: peeping, prowling, looking in windows, watching women undress. sacks: voye

♪ ♪ mccrary: he was physically very punishing with the victims.ting them, abusing them, and eventually murdering them. manipulative, controlling, domineering, and astute enough to get away with this for a long enough period of time. he is our worst nightmare. ♪ ♪ ♪ welcome to "very scary people." i'm donnie wahlberg. from may 1987 to april 1992, there were a series of rapes, abductions, and murders of young women just north of u.s.-canadian border. authorities from several cities in ontario and fbi profilers from the united states joined forces to try and capture those responsible for the vicious attacks. who was behind these horrific crimes? no one could have imagined how disturbing the answer would be. here's part one of "the ken & barbie killers." ♪ rosen: the city of toronto sits on the north shore of lake ontario, and scarborough is on the eastern edge of the city. it's not an unsafe place, and that's what made the fact that you had a serial rapist running around the eastern end of the city so concerning. ♪ the scarborough attacks permeated t

mccrary: but she did have this little bit of a wild streak., a little more activity in her life, a little more excitement in her life. kenzora: and you know, she was pretty focused on getting a boyfriend and getting married, and she had some close girlfriends who spent a lot of time, you know, dreaming about the day they were gonna get married. they had what they called the diamond club, which was talking about the diamond rings they hoped to get for their engagement. she had a path in life, and she was gonna stick to that path. whatever she had to do, she was gonna do. karla did have relationships in high school, but it wasn't really until she met paul bernardo that things really changed for karla. kenzora: paul bernardo and karla homolka met in a hotel lobby in scarborough. i believe she was 17, he was 23, and she was in scarborough for a pet food convention, because she worked at a pet store as a teenager, and he and some friends had shown up at the lobby of the hotel late at night to hit the 24-hour restaurant, and she came down with one o

. ♪>> referee: ♪ mccrary: he was physically very punishing with the victims.domineering, and astute enough

♪ ♪ mccrary: he was physically very punishing with the victims.