Her motivation? God:
"The voice of God called upon her to sacrifice her three children," Teresa Caffese said at the woman's preliminary hearing in San Francisco Superior Court.
But of course! Lashaun was diagnosed as a paranoid schizophrenic with delusional thought disorder. She was a perfect candidate for her afterlife-belief to serve as a catalyst for infanticide, and her God knew it.
Many a Christian would protest, "But she was crazy! Any crazy nut could kill their children! Her religion didn't do this!" They would, admittedly, be half correct. Sure, a paranoid schizophrenic with delusional thought disorder doesn't need religion to do crazy things, but it certainly does help. I would suggest one to look up the definition of the word "catalyst."
I've said it a bazillion times now, and I'll say it again. Religiosity is common among mothers who kill their children. In fact, when a child dies at it's mother's hands, the vast majority of the time it is religious/afterlife/God based motivation. What else ever inspires a woman to kill her children besides religious reasons, regardless of the woman's mental problems?
God and religion only exacerbate mental problems within people's minds. Crazy people turning to God does not help their craziness; it amplifies it. It legitimizes their craziness in their own mind. If your brain is malfunctioning, and you think you are hearing voices, those imaginary voices are given much more power in your mind when you think they literally are coming from an all-powerful creator of the universe. Going to church and having a preacher telling you to "pray" and to "talk to God" certainly won't help. Under such circumstances, these voices in your head will be given so much power that you may act on those voices, like by cutting the arms off of your baby and promptly calling 911 with the hymn "He Touched Me" being heard in the background of the 911 call. Or maybe by systematically drowning your 5 children in the family bathtub one at a time. Or possibly by suffocating your baby and then stabbing yourself repeatedly in the chest. Or finally, to use this most recent example, by throwing your 3 sons into the icy San Francisco Bay.
A good friend of mine works with crazy and homeless people on Skid Row in Downtown Los Angeles. He says that the crazier the patient is, the more keen on Jesus they are. He says that the crazier the patient is, the more they talk with God/Jesus, and the more God/Jesus talks to them. These crazy people genuinely want to have a relationship with God and/or Jesus, but their reaching-out to God helps them not at all. These people are mentally sick, and the closest thing to a cure is treatment, therapy, medication, and sometimes institutionalization. The cure is not, nor will it ever be, God. God is a part of the disease.
Kill the afterlife, not children.