The neglect was not getting medical care for her daughter after she was born. It's not uncommon for babies not to pink up right away, need some stimulation, need their airway suctioned, etc. All things that could make a young girl THINK the baby was dead but in fact it was alive. I very strongly feel that this baby was likely born alive (absent any real evidence all any of us can do is speculate on this) - but that BSR didn't know what to do. She was not capable of making the determination of that baby's prognosis - only medical professionals would have been at that point.
Maybe she even thought the baby was dead when it wasn't, maybe she even buried her while she was still alive, none of that can be proven. But, she didn't get medical care for her daughter (neglect) and she didn't properly dispose of a corpse. There may be more evidence presented that sways me to think that BSR KNEW she was alive and deliberately ended her life or deliberately neglected her to death - I'm not there yet. But, I think there is irrefutable proof of neglect in BSR not obtaining medical care for her daughter after birth.