Patrick J. Fitzgerald, the special prosecutor rumored to be wrapping up the long-running investigation of the leak of a CIA agent's identity, set up a website this week posting previously filed documents in the case. Fitzgerald's spokesman, Randall Samborn, said he "strongly cautions against reading anything into the timing" of the website launch. However, others familiar with the case said it was unlikely that the prosecutor would set up an Internet page if his investigation was going to close without indictments.