Interesting article comparing Knox's own words ... given at separate time. There are conflicts in critical details.
"In the letters, Knox says that on the day Kercher's body was discovered she looked through the keyhole of the British student's locked door and
saw her purse on the bed. In her memoir, Knox says she tried to look through the keyhole, but
saw nothing."
"In a letter to her lawyers, Knox says the
police gave her time to write a statement, while in her memoir she says
they rushed her. The letters say she was
"checked out by medics", an incident that becomes
"the most dehumanizing degrading experience I had ever been through" in her memoir."
"Describing an interview with police in Capanne prison in December 2007 she says
it was attended by the prosecutor, her interpreter, two police and her two attorneys. But there was another person there – a third attorney named Giancarlo Costa. He was the first lawyer to represent her, but later left the case.
Costa has confirmed he was present at the interview and his name is read out in the audio recording of the interrogation. Why would Knox remember so many details but leave him out?"
"Fine points such as these can make or break a case in a court of law, but in the court of public opinion, perhaps they don't matter."
http://www.theweek.co.uk/crime/amanda-knox/52801/amanda-knox-memoir-omissions-and-discrepancies