Also, by all accounts I've read, forensic science isn't exactly held to scientific standards--they use so many tests that have never been experimentally evaluat

Also, by all accounts I've read, forensic science isn't exactly held to scientific standards--they use so many tests that have never been experimentally evaluated, it could more accurately be called forensic folklore. Since judges and lawyers are seldom clueful about the natural sciences, often very strong evidence is ignored in favor of the word of an "expert."