Schlemmer’s attorney said during a pretrial hearing that he will try to prove that she was insane or operating under diminished mental capacity, the AP reported, but she was found mentally competent to stand trial after several stays at a state hospital.
Prosecutors said it wasn’t the first time that she tried to kill the boys. They said Wednesday that Schlemmer had tried to kill the boys before by leaving one in a hot vehicle and by running over both with her van while they were tied up with twine.
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The boys’ father, Mark Schlemmer, was at work at the time of the drowning, several news outlets reported.
If Schlemmer is convicted of the charges, she faces life in prison.