You must have heard in earlier testimony that when a DNA profile is developed, it's accompanied by a probability statistic that tells you the significance of that finding. The findings that are capable of being developed into full profiles give very impressive statistics and very sound numbers. The reason I mentioned the partial profiles was to bring to your attention that very often in real world cases some interpretation has to be done on the findings, and those findings are accompanied by an accompanying level of confidence in the match that's generated.
The DNA finding alone does not result in a conviction. There has to be other evidence that is accompanying that as well.
I'll turn it over to John and let him comment further on the value of the science.