Hair comparison seems questionable on the surface. I can pull two hairs out of my head that look very different. I have some sections of hair that are very fine

Hair comparison seems questionable on the surface. I can pull two hairs out of my head that look very different. I have some sections of hair that are very fine and lighter and some sections that are thick and darker. My hair has also changed texture over the years which seems common for my family. Here is another sad story of a man put to death based on pseudoscience http://www.newyorker.com/magazine/2009/09/07/trial-by-fire http://www.newyorker.com/magazine/2009/09/07/trial-by-fire There is also the partial print of the Madrid bomber fiasco... https://en.wikipedia.org/wiki/Brandon_Mayfield https://en.wikipedia.org/wiki/Brandon_Mayfield