I am a bit more comfortable with fingerprints, though as you said it isn’t conclusive they are unique, or that even small variations won’t be overlooked, or how prints can warp or look different based on how the print is put down.
Though I am sure you have heard about the CSI effect, where jurors now want rock solid scientific evidence, which we don’t always have. I think it is a cautionary tale that we shouldn’t convict on one piece of evidence or circumstantial evidence. But at the same time, something inconclusive shouldn’t rule out a conviction if several other things add up.
