The lies, etc. are a point of concern. However, as has been pointed out they were being questioned harshly with prompts from the police, etc.
Thank goodness we have the 5th Amendment in the U.S. Not like that in Italy. Not even the presumption of innocence that we have. And it seems that the evidence in the Knox case (or lack of evidence) outweighed the statements, etc.
In any regard - the following video is a MUST WATCH I think and is a real eye opener on how statements can be construed. Even true statements from innocent people. It is pretty amazing how it can get twisted.
Video is called “NEVER Talk to the Police” put on by a lawyer. Entertaining as well.
http://www.youtube.com/watch?v=i8z7NC5sgik
There have not been one but a series of lies and coverups so to blame it all on the police is ridiculous.
Also the totally baseless framing of the innocent bar owner by the accused shows a very dark and disturbed mind.
Italian forensic standards are not like American CSI programs, if you ignore the spin and look at the facts and evidence the trust would be on the Italian prosecutor side.