Found on a previously unheard of blogsite:
...there were 161,948 suspicious activity files in the classified Guardian database, mostly leads from FBI headquarters and state field offices. Two years ago, the bureau set up an unclassified section of the database so state and local agencies could send in suspicious incident reports and review those submitted by their counterparts in other states. Some 890 state and local agencies have sent in 7,197 reports so far. And the results? Five arrests and NO convictions.

“Ninety-nine percent doesn’t pan out or lead to anything” said Richard Lambert Jr., the special agent in charge of the FBI’s Knoxville office. “But we’re happy to wade through these things.”

No, it’s not 99% doesn’t pan out…It’s 99.99997% that doesn’t pan out
Link:http://twshiloh.com/?p=4574 and originally in the WaPo 'Top Secret America' articles.