Psychic Serial Killers?

Skeptico and The Two Per Cent Company have both recently commented on what a sad shyster Alison Dubois is. Along the same lines, EoR wonders why Anthony Grzelka doesn't just tell the police who the Claremont serial killer is and where to find him (or her).

Given that both these people are 'real' psychics (real psychics are distinguishable from fake psychics because the real ones reveal information that only you could know by asking you a series of leading questions and providing generalities when that fails, whereas fake psychics reveal information that only you could know by asking you a series of leading questions and providing generalities when that fails) shouldn't they be charged by the police with withholding information relating to a crime? Isn't this the equivalent of an accomplice in the actual murders refusing to name the murderer?

Of course, the only other option that EoR could imagine is that the psychics themselves are the murderers. That would explain their refusal to provide explicit information, and how the murderers are so good at evading capture (psychics obviously know where the police are looking, and go somewhere else).