She tells more than one version of a story during the same trial, and the versions are in conflict with each other. That's the biggest sign that she's a liar She does this with startling frequency, since you'd expect her to catch herself while on the stand and all. So the rest of it comes down to: did someone else say something different than her story? Believe the other person for a better probability of getting the truth. Does she have a motive to lie in whatever she is answering? Then she may be lying. Sometimes she 'probably is' lying (a lot of factors coming together on the same point). A lot of her stories just ring false, too. Nobody gets "spun around" that much by men Fiction authors do that, too, and it's funny how it stands out to readers yet it's hard to spot as the author She likes the spinning visual, apparently!