The Orange County Register reports (http://bit.ly/S5msXQ) Sonia Hermosillo changed her plea to include insanity on Wednesday.
Prosecutors say Hermosillo removed a special helmet her son wore to reshape his head before pushing him from the parking garage at Children's Hospital of Orange County on Aug. 22. They say she validated her parking ticket and drove away. The boy died two days later.
Defense attorney Jacqueline Goodman says Hermosillo suffered from severe post-partum depression.
Hermosillo could now face two trials—first to determine whether she's guilty, and if so, another trial with the same jury to determine her sanity.
Information from: The Orange County Register, http://www.ocregister.com