"They put on fresh gloves and got back to business. Jazz wiped up the blood splatters in the freezer and tossed the tissues in with Howieâ€™s waste. It bothered him that he was leaving evidence behind without some sort of oxygenated bleach, those blood splatters would still show up under Luminol. Of course, the odds of anyone deciding to spray down the morgue freezer and switch on an ultraviolet light were pretty minimal, so itâ€™s not like it was evidence that anyone would ever find or use. Still: Billy Dentâ€™s First Commandment was â€œThou shalt not leave evidence."