Ultimately, no investigative lead produced sufficient evidence for prosecution.

But defense lawyers said that the effort to gather investigative leads could further delay the release of some detainees.

Further, investigative leads were placed on a separate page not given the defense.

Since then various investigative leads have been pursued and, to this day, the file remains open.

They also discuss investigative leads; however, much of the information was redacted.

To neglect that investigative lead would have been derelict.

Newspapers have failed to produce any solid investigative leads of their own.

Nothing that sinister, nothing that promising as an investigative lead.

American officials acknowledge that they are running out of investigative leads in the United States.

Thus they could not be prosecuted for anything said in their testimony - or even any investigative leads produced by their remarks.