McKINNEY, Texas —  The murder trial of a woman accused of killing her baby by severing the girl's arms went into its fourth day of jury deliberations Saturday.

Dena Schlosser, 37, has pleaded innocent by reason of insanity in the death of her 10-month-old daughter Margaret.

Prosecutors want her sentenced to prison for life. The defense says Schlosser didn't know right from wrong and say she should be committed to a state mental hospital.

Jurors said they were deadlocked Thursday, but the judge ordered them to keep deliberating. By Friday evening, they had deliberated for 30 hours.

Among the notes the jurors sent to the judge was a request for him to define "deliberation" and the precise role of a juror. State District Judge Chris Oldner read the answers from Black's Law Dictionary.

Police in November 2004 found Schlosser in her home, soaked in blood, holding a knife and listening to a hymn while the baby lay dying in her crib.

During closing arguments, Assistant District Attorney Bill Dobiyanski displayed a bloody kitchen knife and urged jurors to hold Schlosser accountable for the death of her daughter. He said psychiatrists were merely taking educated guesses when they testified Schlosser didn't know right from wrong.

Defense attorney Bill Schultz said the case comes down to whether Schlosser knew the attack was wrong. He also said prosecutors have no business questioning medical professionals.