Well yes, but IMO the lies should have proved her guilty. Why else would she make up all that crap?
Well in our justice system it is always the burden of the prosecution to relay to the jury that you are guilty beyond a reasonable doubt. While she is a liar, and has lied many times, that doesn't in and of itself make her a murderer.
take for example there is a murder that I looked really guilty for but didn't do (assume these are facts) but I lie to the police about it to make it look not so bad on me, if the police catch you in the lie (as they will) it makes you LOOK guilter, but not be guiltier.
This makes a very good case study into how if you are a suspect of a crime, it is NEVER a good idea to talk to the police. Several things could happen if you do, A) you will lie and they will catch you, B) they will force/coerce/trip you up into making a mistake which makes you look guilty (even if circumstantial), C) they will find someone to go against your story (it would just take one person who might think they might have seen you somewhere other than where you said you were to make you look like a liar) D) they might just get a confession out of you (false or otherwise). While I will (hopefully) never find myself in a situation where I am charged with a serious crime, I know enough not to say anything that my [hopefully] very good and well paid attorney doesn't specifically say I can.
Just think about it, we all think (me included) that she is guilty because she lied. A lot. A Whole lot. The facts don't matter to us as much as the fact that she lied. She would have looked guilty if she had refused to cooperate outright and just not said anything, but would she have looked more guilty? I don't think so. (but in fairness its hard not to
look more guilty than she did)