Another nurse, who took the next shift, locks the nursery door, takes out a scalpel, and starts to stab Ritter's son and other infants in the nursery. Before anyone can break into the nursery, the nurse has killed all the newborns and slit her own throat.
A nurse working the following shift locked the nursery door, took out a scalpel, and began stabbing babies in the nursery.  Before anyone could intervene, she had killed all the infants and then committed suicide by slitting her own throat.