So take two people, take two hairs of each, pick two random hairs of those two, and compare them. I guess this could work out quite well. Do this for 1000 pairs of two different people, and 10 will fail, so that is 1%.
This is how I understand it now. It's not that he says that he compares one hair to those 1000, and then still was sure to be able to keep them apart. That was how I first read it.
For a good comparison, he should have used a line-up. Take one hair from 100 persons with similar hair color and use that as test sample. If he was still able to tell which was from the same person, he would have a case.
This is how I understand it now. It's not that he says that he compares one hair to those 1000, and then still was sure to be able to keep them apart. That was how I first read it.
For a good comparison, he should have used a line-up. Take one hair from 100 persons with similar hair color and use that as test sample. If he was still able to tell which was from the same person, he would have a case.