48 HOURS MYSTERY TO BROADCAST "AMANDA KNOX: THE UNTOLD STORY"

REVEALS AMANDA'S PERSONAL ACCOUNTS OF CRUEL MANIPULATION AND SEXUAL INTIMIDATION WHILE IN PRISON

PLUS: NEVER-BEFORE-SEEN VIDEO DIARIES FROM AMANDA'S BEST FRIEND

Caption: Investigative Journalist and CBS News Consultant Bob Graham reads a letter from Amanda Knox

Following the acquittal of Amanda Knox this week, 48 HOURS MYSTERY will broadcast "Amanda Knox: The Untold Story," on Saturday, Oct. 8 (10:00 PM, ET/PT) on the CBS Television Network. Correspondent Peter Van Sant has covered this dramatic case through the years from Perugia, Italy, and has now followed Amanda and her family to Seattle. His report reveals details of the cruel manipulation and sexual intimidation Amanda endured while behind bars, in her own words, from a letter that she wrote. She said a high-ranking prison administrator ordered her into his office alone, at night, to talk about sex. Amanda eventually came to believe that the administrator's real motive was to intimidate her and provoke her to say something that would support the prosecution's theory that she really was a sex-crazed killer.

48 HOURS MYSTERY will also broadcast exclusive video diaries from Amanda's best friend Madison Paxton, collected over 10 months. Paxton moved to Italy to support Amanda and help fight for her freedom.

Van Sant will discuss the case on Facebook, while the producers of 48 HOURS MYSTERY lead the conversation on Twitter from 10:00 - 11:00 PM, ET/PT on Saturday, Oct. 8.

Following are excerpts from "Amanda Knox: The Untold Story." MANDATORY CREDIT 48 HOURS MYSTERY.

Investigative journalist and CBS News Consultant Bob Graham, reading from Amanda's letter to him: "'He was fixated on the topic of sex, with whom I'd done it, how I liked it, if I would like to do it with him. When I realized that he really wanted to talk to me about sex I would try to change the subject.'"

Correspondent Peter Van Sant: "What does this letter say to you about what she's been going through?"

Graham: "It says in a time when she was clearly traumatized by the events of the death, the murder of her flatmate, that there she was, an innocent abroad, because she was innocent, she is innocent� and here she was being pressured, further pressured in a prison system, a system that at least she should have had some degree of safety."

Graham, reading Amanda's letter: "'I realize that he was testing me to see if I reacted badly, to understand me personally. He wanted to get a reaction or some information from me. I did not get the seriousness of the situation.'"

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