DUMB and DUMBer ::"Because I Got High"

ROME, Italy (CNN) -- American college student Amanda Knox took the stand Friday in an Italian courtroom, defending herself against charges that she took part in the killing of her roommate two years ago, her lawyer said.

Knox, 21, from Seattle, Washington, distanced herself from the confused and conflicting deposition she gave to police just days after her roommate, British student Meredith Kercher, was found dead.

She said she was under the influence of marijuana when she spoke to police and did not realize at the time that her police interview was on the record.

Kercher's body was found half-naked in her bed Nov. 2, 2007, at the villa she shared with Knox. Prosecutors have said Kercher, 21, died in a "drug-fueled sex game" with Knox and Knox's then-boyfriend, Raffaele Sollecito.

Kercher suffered a knife wound to the neck. In court papers, prosecutors alleged Sollecito held Kercher by her wrists while Knox poked her with a knife and Guede sexually assaulted her.