as novel, interesting, but not confirmed science. greta, one of the things the national academy of science report criticized by microscopic hair analysis has lead to convictions of a number of innocent people by comparison studies. we have to be careful about that. >> greta: be careful! the prosecution has to be careful about it. the last thing the prosecution wants to do, as you say a novel theory. a novel theory if you get a conviction a court of appeals may say it is so novel we shouldn't do it and throw out the conviction. i don't understand why the prosecution is advancing anything novel. it makes vulnerable any conviction. now another problem. the cause of death. homicide by undetermined means. and the witness says, because the remains shouldn't have ended up in the woods. now, a accident could end up in the woods as well.