sudden death of infant mandates autopsy to find cause of death,

autopsy should be done at the medical examiner's office. There are lots of reasons such as medical, idiopathic or child abuse etc. But if it is found be shaken baby syndrome etc, it does not matter if your babysitter has insurance or not because he/she will have criminal charges. Wait for medical examiner's report. Find a good lawyer is a good idea.

Sorry to hear that and take care!