Currently I've tried 3 lipstick killer cases, where the message is "[victim] + [Killer Initial] forever!"
The problem is, every single one, the killer was not a work colleage or phone book connection.
All the victims were being followed. Their emails show they report this to the doctor and give info on the physical appearance. This info is useless as you can't pin it.
CCTV search doesnt show the killer.
Sales ledgers in the city do not show them buying lipstick or the knife (they take it with them so seems to be using the same weapon, hence not in ledgers).
Even if you ask neighbours, again, they can only give you physical appearance attributes, which is no good as it wont lead you to a location.
The only method to solve this kinda case is to take the [killer initial] go through the phone book, note each person, then go to city hall and use the gov database. Please make it so their is a way to solve these cases without such a tedious process.