There are those who believe that the spirit stays around for awhile after the body dies. Those who believe that would say it could be that her spirit stayed there until help came for her child.
The baby saved and is doing better. That all the officers heard the voice is most uncommon. Reminds of a story on the teevee show, “One Step Beyond”, the episode ‘Tidal Wave’ A deaf man heard the whisper a helpless woman which saved her from the approaching tsunami Do do do do do do...strange, unexplained. Thank you, Jesus.