1.   Maurice breaks his promises so consistently that he begins to seem a professional liar.

2.   A professional liar who ruthlessly killed his way across half the country would not have stepped forward, apologized and offered any kind of rational explanation for his behavior.

3.   But from the moment she made her account public, prosecutors have ridiculed it as the rantings of a professional liar.

4.   If there is one thing we know about criminals, it is that they are professional liars.