[Bella]

He let everyone know that the arrested were not the shooter (otherwise, why would he send a message to the shooter after the arrest) so the shooter did not have to strike again to prove he is still free.

That's right..With all the advanced technology that they're using throughout this investigation, I wonder WHY they haven't been able to take him down?...

[Letitring]

LOL, Chris Matthews et,al., are onto the Zodiac killer, I feel better now. :)

[aristeides]

With all the advanced technology that they're using throughout this investigation, I wonder WHY they haven't been able to take him down?...

He seems to know in advance what the police are going to do. Mole in the investigation?

If Linda Franklin was targeted specifically as an FBI analyst involved in the sniper investigation, how was the sniper able to identify and track her. The same explanation suggests itself.