The Andrea Yates case is the story of a Houston mother who drowned her five children during severe postpartum psychosis in 2001, was convicted of capital murder in 2002, had that conviction reversed after a prosecution expert’s testimony was shown to be false, and was found not guilty by reason of insanity at a 2006 retrial. She has been committed to a Texas state psychiatric hospital ever since.
What Happened on June 20, 2001
On the morning of June 20, 2001, Andrea Yates drowned her five children one by one in the bathtub of her Houston home: Noah, 7; John, 5; Paul, 3; Luke, 2; and Mary, 6 months. Her husband Russell, a NASA employee, had left for work about an hour earlier. Yates’s mother-in-law was expected at 10:00 a.m. to help with the children, and the killings happened in that window when Yates was alone with them.
After the drownings, Yates laid the four youngest on the bed and covered them with a sheet. Noah was left in the tub. She called 911, then called Russell and told him to come home. When police arrived, she confessed at the scene. She later told investigators she had heard voices and believed she was saving her children’s souls.
A Documented History of Severe Mental Illness
The killings did not come without warning. Yates had a psychiatric history stretching back at least two years, and multiple doctors had flagged the danger.
In June 1999, shortly after the birth of her fourth child, Luke, Yates overdosed on the antidepressant Trazodone and was admitted to a psychiatric unit, where she was diagnosed with major depressive disorder. About a month later, Russell told her psychiatrist, Dr. Eileen Starbranch, that Andrea had held a knife to her own throat. She was hospitalized again and treated for roughly two months as both an inpatient and an outpatient, during which she was prescribed the antipsychotic Haldol. Her condition improved on the medication.
Dr. Starbranch specifically warned the couple that another pregnancy could trigger a new psychotic episode. Yates eventually stopped taking her medication, saying she felt better, and became pregnant with her fifth child, Mary, born in November 2000. By March 2001, Russell called Starbranch’s office reporting that Andrea was deteriorating. Starbranch later testified she recognized this as an ominous sign and asked that Andrea be brought in immediately. That spring, Yates was hospitalized twice more and again prescribed strong antipsychotics, including Haldol.
Despite all of this, Yates was home alone with all five children on the morning of June 20.
The 2002 Trial and Capital Murder Conviction
Yates stood trial in 2002 on multiple counts of capital murder. The prosecution sought the death penalty. Its core argument was that Yates knew what she was doing was wrong. Prosecutors pointed to the sequence of her actions as evidence of awareness: she waited until Russell left for work, called the children in one by one, covered the bodies, and then called 911 and her husband. “She knew it was wrong,” the lead prosecutor told the jury.
The defense, led by George Parnham and Wendell Odom, entered a plea of not guilty by reason of insanity. They presented testimony about Yates’s postpartum psychosis, her hospitalizations, and her delusional belief that she was rescuing her children from eternal damnation. Multiple mental health experts testified that she was psychotic at the time of the killings.
The key prosecution witness was Dr. Park Dietz, a prominent forensic psychiatrist. Dietz acknowledged Yates was psychotic on June 20, 2001, but testified that she nonetheless knew her actions were wrong.1Justia. Yates v State of Texas, First Court of Appeals 2005 He was the only mental health expert to reach that conclusion. On cross-examination, Dietz also testified that he consulted on the television show “Law & Order” and that an episode had recently aired depicting a woman with postpartum depression who drowned her children in a bathtub and was found insane.
The jury rejected the insanity defense and convicted Yates of murder. It took less than 30 minutes to reject the death penalty, and the court sentenced her to life in prison with parole eligibility after 40 years.
Why the Conviction Was Overturned
After the trial, one fact turned the case around: the “Law & Order” episode Dietz had described did not exist. No such episode had ever been produced. Dietz acknowledged his error in a written stipulation.1Justia. Yates v State of Texas, First Court of Appeals 2005
The prosecution had used Dietz’s testimony about the episode in closing arguments to suggest that Yates might have taken the blueprint for her insanity defense from television, undermining the sincerity of her claimed delusions. Without a real episode to point to, that argument collapsed.
In 2005, the Texas First Court of Appeals reversed the conviction and ordered a new trial, holding that the false testimony was material and could have affected the jury’s verdict, particularly because Dietz was the only mental health expert who testified that Yates knew right from wrong.1Justia. Yates v State of Texas, First Court of Appeals 2005
The 2006 Retrial and Insanity Verdict
Yates was retried in 2006. Both sides largely repeated their positions. The prosecution again argued she understood her actions were wrong; the defense again presented evidence of her psychosis and delusional beliefs. What was gone was the false “Law & Order” testimony, and with it the prosecution’s ability to suggest Yates had fabricated her insanity claim.
On July 26, 2006, the second jury found Andrea Yates not guilty by reason of insanity.2Bloomberg. Yates Was Insane When Children Drowned, Jury Finds The verdict did not mean she walked free. In Texas, an insanity acquittal triggers mandatory commitment for evaluation and a disposition hearing within 30 days.
The Insanity Standard That Decided Both Trials
Section 8.01 of the Texas Penal Code defines insanity as an affirmative defense. To succeed, the defense must prove that at the time of the offense, the defendant, as a result of a severe mental disease or defect, did not know that the conduct was wrong.3State of Texas. Texas Penal Code Section 8-01 – Insanity The statute also excludes conditions that show up only as repeated criminal or antisocial behavior.
The Texas rule descends from the M’Naghten standard and is narrower than some states’ tests. It asks only whether the defendant knew the conduct was wrong. It does not ask whether the defendant could control their behavior. A defendant can be severely psychotic and still lose the defense if the jury believes some part of them recognized the wrongfulness of the act.
That distinction is where the Yates case split. Both juries heard substantially the same evidence about her mental illness, and the diagnosis of postpartum psychosis was never in dispute. The first jury, hearing the false “Law & Order” testimony, concluded she knew her actions were wrong despite her psychosis. The second jury, without that tainted evidence, concluded her delusions were so severe that she genuinely believed she was doing the right thing for her children.
What Happens After an Insanity Acquittal in Texas
An insanity verdict in Texas does not end the court’s involvement. After the 2006 acquittal, Yates was committed for evaluation under Chapter 46C of the Texas Code of Criminal Procedure.4State of Texas. Code of Criminal Procedure Chapter 46C – Insanity Defense The court then held a disposition hearing to decide whether she required inpatient treatment, outpatient supervision, or could be released.
For continued inpatient commitment, the state must prove by clear and convincing evidence that the person has a severe mental illness, that the illness makes them likely to cause serious bodily injury to others without treatment, and that inpatient care is necessary for public safety.4State of Texas. Code of Criminal Procedure Chapter 46C – Insanity Defense That standard was met for Yates.
The commitment is not permanent by design. The acquitted person, the facility, or the state can request modification at any time. To step down to outpatient supervision, the acquitted person must show by a preponderance of the evidence that treatment can be safely and effectively provided outside a hospital.5State of Texas. Texas Code of Criminal Procedure Article 46C.257 – Order to Receive Outpatient or Community-Based Treatment and Supervision Outpatient orders last one year and can be renewed. For full discharge, the person must prove either that they no longer have a severe mental illness or that they are no longer likely to cause serious harm to others because of any mental illness.4State of Texas. Code of Criminal Procedure Chapter 46C – Insanity Defense
Where Yates Is Now
In January 2007, Yates was transferred to Kerrville State Hospital in central Texas, and she has remained there since. Each year she is eligible for a review hearing that could lead to a step-down in her level of care or eventual release. Every year through at least 2022, she has waived that right. Her attorney, George Parnham, has confirmed the decision to waive is hers: she chooses to remain in the facility and continue treatment. Parnham has said he visits her roughly every two months and that she has access to a cell phone.
Laws That Came Out of the Case
The case prompted legislative action in Texas. In 2003, the Legislature passed what became known as the Andrea Yates Law, requiring hospitals and medical professionals to give patients information about postpartum illnesses. It was revised and reintroduced in 2005 with broader requirements for healthcare professionals and agencies serving women during and after pregnancy.
Two further Texas bills went nowhere. One would have created a distinct criminal offense of infanticide. Another would have required courts to consider postpartum psychosis as a factor at sentencing. Neither made it out of committee.
Outside Texas, Illinois later became the first state to pass legislation allowing postpartum depression and postpartum psychosis to be considered as mitigating factors at sentencing for crimes committed while a woman was suffering from those conditions. The Yates case remains the reference point whenever the intersection of postpartum psychosis and criminal responsibility comes up in legislatures or courtrooms.