found this from google groups:
3. KEEP A MAP OF THE CITY YOU ARE STALKING: The Homocide Detectives will have
a map with pins indicating where you have struck, and thus will try to trace a
pattern or killing area. Plan your killing zones carefully, as well as
randomly. If you WANT to have fun with this though, leave your victims at
strategic points on the map (one on top, one on the upper left of the map, one
on the lower right, etc. etc.). Imagine the faces of the cops that are trying
to figure out your next strike when the pins on the map form a pentagram or a
smiley face. [
link to groups.google.com]