The flip side is the comment I made that the more you increase it, the greater the chances of false positives and false matches. And this isn't science fiction. You're seeing a new wave of cases in the States and challenges coming to databases. They want to get their independent research of the databases. For example, in Arizona they found that at nine loci, and I know we have 13 in ours, there were a number of false matches in that system. And on the basis of that, there have been a lot of challenges to different state databases where they want access to it to see what the chances are that there are false matches. So it does happen, and statistically it's always going to happen if you don't test the whole DNA strand, which isn't going to happen for many years.
On February 26th, 2009. See this statement in context.