The toxicology is pretty damning: codeine without morphine in stomach contents means someone crushed up Tylenol-3 and gave it to a 12-day-old baby. That's not a metabolic quirk—it's homicide. Koren's "ultra-rapid metabolizer" theory provided cover, and his research went on to clear 17 other caregivers in similar deaths. How many of those were actually murdered infants?