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. >>> femme fatale. is she a cold-blooded killer or a victim of abuse? >> so you began having sex the first day you met? >> correct. >> this mother of three on trial for allegedly murdering her husband in the same courthouse where jodi arias proclaimed her innocence. >> he attacked me. >> the eerie similarities right down to the bizarre behavior. >> then the next thing i saw the hammer going. >>> plus modern gold rush. it's spring thaw. time for an annual scramble for hidden treasures. >> this is it. >> these seven miners on a gonzo mission in one of the most remote places in the world. but will they strike it rich? "nightline" will be right back. >>> good evening. we begin tonight with that breaking news out of south america. that powerful 8.2 magnitude earthquake off the coast of chile just hours ago. the president of chile has declared the northern part of the country a disaster zone, and armed forces are on their way to the area right now. a tsunami advisory has been issued as far away as hawaii with a wave expected to hit there somewhere between 9:0

. >>> femme fatale. is she a cold-blooded killer or a victim of abuse? day you met? >> correct. >> this mother of three on trial for allegedly murdering her husband in the same courthouse where jodi arias proclaimed her innocence. h

. >> reporter: the bombshell model has appeared in magazines, billboards and even as the femme fatalen a comic book series. this morning, monica olsen is expected to face her estranged husband, dino guglielmelli, in court. he's accused of trying to have her killed. guglielmelli, seen in this interview about fda regulation, is the founder of a multimillion dollar natural products company and the distributor of monica's successful skin care line sold at drugstores nationwide. >> i have almost 400 employees. i am a success story. >> reporter: but the business went bust after guglielmelli was arrested in october accused of attempted, willful, deliberate and premeditated murder and solicitation of murder. according to court documents, guglielmelli asked a friend to kill olsen. that friend recorded their conversation and went to police. >> when the jury hears the tapes, they're going to understand he was manipulated by somebody who was trying to help himself. >> reporter: guglielmelli's defense attorney says his client was set up by a former friend in the midst of a bitter divorce battle. b

the femme fatale, then, is a seductress.a very beautiful woman whose beauty bedazzles the male hero and who uses her beauty and the bedazzling of the male to achieve her usually evil ends. listen, baby. you got him right where you want him. he's on the hook and can't get off. he can walk out, can't he? he's got a wife, hasn't he? just drop a hint that his wife might find out about this apartment and he'll shell out fast. that's blackmail. it's only blackmail, baby, when you're dumb enough to get caught. what's very interesting about kitty as a femme fatale is her subservience to johnny. her femme fatale nature is brought out by johnny. (knocking on door) is that him? i told you i heard the doorbell. get rid of him. it's very clear it's specifically sexual prowess that keeps kitty tied to johnny. we don't actually see any sexuality, but it's clearly indicated that they are involved in sex and leisure and pleasure. this scene seems to be heavily encoded. there's a whole underlying sense of them belonging to a particular demimo