Anchorage police had a sneaking suspicion that Sherry Morrow's murder was not an isolated incident.  Over the last two years, there was a sudden increase in the number of missing persons reports being filed, many of which were topless dancers and prostitutes.  Prior to this latest discovery, the reports had not prompted much attention.  Prostitutes tend to be loners and often travel from city to city, only to reappear years later.  If there was a link,