PERUGIA , Italy ( CNN ) -- American student Amanda Knox , accused of killing her housemate two years ago , testified in her murder trial Saturday that she was intimidated by Italian police during questioning . American college student Amanda Knox , 21 , testifies Friday at her murder trial in Perugia , Italy . Knox , 21 , is charged in the death of British student Meredith Kercher , who was her housemate in Perugia , a university town north of Rome . Kercher , 20 , died in what prosecutors say was a `` drug-fueled sex game '' after suffering a sexual assault . She was found half-naked , with a stab wound to her neck , in her bed November 2 , 2007 . Saturday was the second day of testimony for Knox , who is from Seattle , Washington . The public prosecutor , her defense lawyer , the attorney for her then-boyfriend Raffaele Sollecito , and the judge asked her about what happened the night of Kercher 's death and the following day . Both Knox and Sollecito , 25 , are charged with murder and sexual assault . Knox tried to explain Saturday why she gave conflicting answers to police when they interrogated her on November 6 . She said it was a combination of police pressure , their suggestions , and her confused and frightened state of mind . `` When I would say that I was with Raffaele , they would say , 'You are a liar , ' and they repeated this , '' she said , testifying in fluent Italian . `` You will go to prison for 30 years . ... You must remember , '' Knox recalled the police as saying . Knox said the police were standing behind her and officers were going in and out of the interrogation room . A policewoman next to her was constantly pressing her to give them a name , and an interpreter on her right said people under trauma tend to forget things , she said . `` I was confused . ... I had so much fear , '' Knox said . She testified that she thought , `` Hell , perhaps they 're right and I have forgotten . '' Knox repeated Saturday that police slapped her on the back of her head while questioning her . As she spoke , she hit her head a few times with her right hand and gestured broadly . Knox testified Friday that she was not at the women 's villa the night Kercher died , which authorities believe was the evening of November 1 . She said she was at Sollecito 's house . Watch Knox take the stand » . Knox testified Friday that the couple had dinner , watched a movie , smoked marijuana , had sex and went to bed on the night of November 1 . She said she returned to her and Kercher 's villa the next morning to take a shower . That 's when she said she noticed `` strange things '' such as the front door being left open , dried blood in the bathroom sink and on a bath mat , feces in the toilet , and the door to Kercher 's room locked . Watch Knox in court » . When Knox returned to Sollecito 's house , she said , he suggested they call police in case the house had been burglarized . Police then found Kercher 's body . All cameras were barred from the courtroom Saturday because the public prosecutor said he wanted to avoid `` sensationalism . '' Cameras were allowed at the beginning of the session Friday but then ordered out . Knox 's father , Curt , defended his daughter Saturday . `` What we 've seen over the past five months is a character assassination , and now , hopefully ... . a different point of view of who she is is coming out , '' he told reporters . People are beginning to see that `` she is not this dark angel she 's been portrayed as , '' he added . `` Amanda did a great job '' on the stand , Curt Knox said . `` She was very articulate in her answers . She answered all of the questions truthfully . She was not quivering in her voice . She was looking the judge in the eyes . '' Her attorney , Carlo della Vedova , described his client as `` very confident . '' `` She has repeated exactly what happened that night , on the fifth and sixth , when she was arrested . She gave all the information that was requested '' during her testimony , he said . The trial is to resume next Friday , but Knox is n't expected to testify again . A third person , Ivory Coast native Rudy Hermann Guede , was convicted of murder in a fast-track trial in October and sentenced to 30 years in prison . He is appealing the verdict .
NEW : Ivory Coast student Amanda Knox says Meredith Kercher , slapped , confused her . Knox , ex-boyfriend on trial in death of Knox 's British housemate , Meredith Kercher . Knox contends she was at boyfriend 's house the night Kercher was killed . U.S. native Kercher sentenced to the past five months for Kercher 's murder .