Amanda Knox, the American college student accused of murdering her roommate in Italy, took the stand today, and claimed that the Italian police hit her when they interrogated her and that they called her a “stupid liar.” The 21-year-old offered these tales as justification for why she signed a self-implicating statement that she now says was false. "They got tough with me, called me a liar and said I was trying to protect someone," she said on the stand. "They continued to call me a stupid liar. … They were putting my phone in my face... from that point on, I was very scared because they were treating me so badly and I didn't understand why." Knox’s most emotional moment on the stand was when she recalled the day the murder was discovered.