Andrea Pia Yates ( Kennedy; born July 2, 1964) is an American woman from Houston, Texas, who confessed to drowning her five children in their bathtub on June 20, 2001. The case of Yateswho had exhibited severe postpartum depression, postpartum psychosis, and schizophrenia leading up to the murdersplaced the M'Naghten rules, along with the irresistible impulse test for sanity, under close public scrutiny in the United States. Wikipedia