Yates, shown here on March 21, 2002, was sentenced to life in prison in the deaths of three of her children. She was not tried in the deaths of the other two.
Yates' lawyers had argued at a hearing last month before a three-judge panel of the First Court of Appeals in Houston that psychiatrist Park Dietz was wrong when he mentioned an episode of the TV show "Law & Order" involving a woman found innocent by reason of insanity for drowning her children.
After jurors found Yates guilty, attorneys in the case and jurors learned no such episode existed.
"We conclude that there is a reasonable likelihood that Dr. Dietz's false testimony could have affected the judgment of the jury," the court ruled. "We further conclude that Dr. Dietz's false testimony affected the substantial rights of appellant."
The court ruling returns the case back to the trial court for a new trial.
Jurors in 2002 sentenced Yates to life in prison in the 2001 deaths of three of her children. She was not tried in the deaths of the other two.
The defense's appeal cited 19 errors from her trial, but the appeals court said since the false testimony issue reversed the conviction, it was not ruling on the other matters. Among other things, Yates attorneys had claimed the Texas insanity standard is unconstitutional.
An undated photo shows the oldest four of Andrea and Russell Yates' five children. Andrea Yates drowned all five on June 20, 2001, in the family's Texas home.
"We agree that this case does not involve the state's knowing use of perjured testimony," the appeals court said in its ruling. But the judges said prosecutors did use the testimony twice and referred to it in closing arguments.
Psychiatrist Park Dietz, the prosecution witness whose testimony led to the overturning of Yates' convictions, heads to Yates' trial on March 7, 2002.
A wet and bedraggled Yates called police to her home on June 20, 2001, and showed them the bodies of her five children: Noah, 7, John, 5, Paul, 3, Luke, 2, and 6-month-old Mary. She had called them into the bathroom and drowned them one by one.
Russell Yates speaks to reporters at the end of his wife's trial on March 15, 2002.
Prosecutors acknowledged she was mentally ill but argued that she could tell right from wrong and was thus not legally insane.
Images of the Yates children -- Noah, John, Paul, Luke and Mary -- adorn the headstone that marks their graves in Webster, Texas.
Source: AP
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