The Orange County District Attorney's Office says Sepulveda tried to keep her pregnancy a secret from her husband because he is not the father. Her two other children were also kept in the dark.
Then, on August 16, 2008, Sepulveda gave birth to the baby girl in her Laguna Niguel apartment. Prosecutors say a few hours later, Sepulveda dumped the baby in a nearby dumpster.
Sepulveda's husband caught on and sent their daughter to look for the newborn. She found the child and the baby was taken into protective custody.
Prosecutors say Sepulveda admitted to police that she knew she could have placed the baby up for adoption or surrendered her to a fire station, under the state's safe surrender law.
The baby is in good health and living with Sepulveda's father, according to Deputy District Attorney Cyril Yu.