I don't know about the US, but in Canada the Jian Ghomeshi trial is one recent example that comes to mind. Both the Ghomeshi trial and the Canadian trial of Gregory Alan Elliott show that there are indeed types of people out there who lie to bring charges, or increase the weight of charges bought against someone. And it shows they will lie all the way up to and through a court case, until cross examination (or in Elliott's case an insider tip off of conspiracy) unravel the lies.

I don't know what to think in this case but it is not something you can rule out completely.