From the quoted link:
District Attorney John Adams declined to say why prosecutors had agreed to let Snyder plead no contest to the reduced charge of third-degree murder, which carries a sentence of 20 to 40 years in prison.
“We don’t contest the fact that she’s mentally ill, and she meets the threshold set up under the law that she is mentally ill," he said in a phone interview after the hearing.
Snyder's defense lawyers had no comment. Snyder had no reaction to the judge's ruling and ignored a reporter’s questions outside of the courtroom.
[..]
The defense had
planned an insanity defense, citing a “chronic history of severe mental disorders.” Her lawyer has said Snyder had severe depression, borderline personality disorder, dissociative disorder and other mental illness at the time of the homicides.
Prosecutors had indicated they would seek the death penalty.
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I dunno -- from capital murder to pleading no contest to reduced charge of third-degree murder sure sounds insulting to me. I think I can understand the Judge walking out of the courtroom. Seriously, could not admit 3rd degree murder? Wow. These were her babies and she wanted them out of the way. JMO