The Phenophthalien(i know i can't speel) test: This one show they have a dead body, from the desert. They test a bathtub as they think the murder and blood was there. They use the pheno-blood test often. But if its in the bathtub. As pheno is just a ph indicator. Couldn't a base cleaner, as most are, change the readings, or make it look like there is blood where there isn't any? Or is this just a fancy word that they are using for the fictional show and i am just being fanatical?