A toddler, shot in the head, is in an induced coma. Agonized parents want life support at least until the child’s second birthday. “My baby is still fighting,” the mother says. The hospital is testing for brain activity. A pediatrician faces a second opinion with wrenching consequences. And a ethicist says there is no legal or ethical reason the hospital cannot disconnect life support if the child is declared dead. This is playing out now in Oakland, California.