1. A method of using impostor match behavior of biometric gallery samples to add a false match probability score to a match score to assist with match/no match decisions comprising: determining, at least using a processor and storage, a first match score between a biometric probe sample and a gallery sample; determining, as the false match probability score, at least using the processor and the storage, a plurality of gallery match scores between the gallery sample and a plurality of other samples; determining, at least using the processor and the storage, a number of the plurality of gallery match scores that are greater than the determined first match score; determining, at least using the processor and the storage, a plurality of probe match scores between the probe sample and the plurality of other samples; determining, at least using the processor and the storage, a number of the plurality of probe match scores that are greater than the determined first match score; and using information from the above determining steps to assist with match/no match decisions.