Reading through old Sentinel clippings from Harry V Martin. I am aware he has a mixed reputation as a journalist and is now dead.
But he surmised there was more than one killer, and I wondered if this is possible, considering the variance in M.O. the perp(s) used.
If the idea of these ciphers was to provide clues that actually steered away from the killer(s), is that concept discredited or can it be considered viable?
In other words, could there have been a team of killers, both committing the murders and releasing clues?
Use the search function with the words "team Zodiac", you will get many hits. Ask your questions in one of the threads where the Team theory is being discussed. I will delete this thread in a day or two.