The 18-year-old Modesto High School student suspected of trying to kill her month-old baby placed rat poison in the infant's bottle, authorities said Thursday.
Thursday's arraignment of Cashel Sophia Phin in Stanislaus County Superior Court was postponed until today.
But Deputy District Attorney W.R. McKenzie said Phin also offered two people goods and services if they would poison the infant, who was born April 13.
It's not immediately known if the baby girl ingested the poisoning or suffered any injuries.
The baby, named Anna, is "safe and sound" with her aunt, according to Sacramento television station KTXL Fox 40.
The aunt told the TV station that the family knew Phin was "having some issues following the birth" and that she was "stressed" and "depressed," but didn't think she would harm the infant.
One of Phin's friends called police, according to the TV station.
Phin was charged with attempted murder, two counts of solicitation to commit murder and one count of willful poisoning. She remains in jail on $1.6 million bail.
Asked why Phin did not appear in court Thursday, McKenzie said only that, "The judge found good cause for her not to appear today."
She was arrested Wednesday after police say she told a fellow Modesto High student Tuesday that she wanted to kill her baby by throwing it into a trash can, according to Modesto police Lt. Jolene Gonzalez.
Gonzalez said police went to the woman's house, where they were told that Phin also swung her purse at the infant and tried to persuade her sister to kill the child by feeding it rat poison.
Bee staff writer Erin Tracy can be reached at email@example.com or (209) 578-2366.