>> six months after mary lee was born, marie reported finding her gasping for breath and turning blue. she called the rescue squad but the baby could not be saved. >> everybody was on the alert when this case came in. >> when the baby was brought in doa, doctors were very concerned. one, because this was now seven children, six of them had died under mysterious circumstances. >> the late dr. halbert fillinger who was the assistant medical examiner in philadelphia during this time, performed the autopsy. >> we had all pretty well developed quite a bit of concern why they were dying and whether or not there was some sort of criminal activity. >> despite their growing suspicion, the doctors in the medical examiner's office couldn't find any evidence of foul play. no bruises on the bodies, no apparent trauma. police did question marie noe after the death of her seventh child.