Not really ...
Knox, and many other witnesses, were questioned in the days leading up to the day that Knox falsely accused an innocent man of murder.
Knox provided an alibi that could not be independently verified. That is, although she claimed that she was at Sollecito's apartment watching a movie, eating dinner, listening to music, having a shower and sleeping, it was proven untrue. That is, dinner was not at 10 or 11 as Knox claimed, but at 8:20 or 8:30. The movie concluded at 9:10 and there was no human interaction with the computer until the following morning at about 6 AM, when the computer was used for music. I don't believe they sat in silence from 9:10 until the following morning.
After two hours of questioning as a witness, at a time when Knox was not expected to be at the police station, she falsely accused an innocent man of murder. No one knows what was said during that interview except what was written in the statement that Knox signed at 1:45 in the morning. At this time, her status was changed from witness to suspect and she was detained.
At about 5:45, after demanding to be heard, she again signed a statement confirming her earlier statement. Neither this statement, nor the one signed at 1:45, were used against her in court ... they were inadmissable.
Later, while alone in a cell, she asked for paper/pen and reiterated that she stood behind her statements about Patrick. I don't remember the date of this voluntary statement that she described for police as a "gift". For some reason, Nov 9 comes to mind.
Knox did not declare that Patrick was innocent. In fact, she remained silent regarding his innocence.
Regardless of her changing alibi, the events that she claims occurred at Sollecito's apartment between 9 PM and 10 AM (when she said they woke up) did not happen.