Prosecutors have refused to characterize the recordings, and whether they contain the kind of blockbuster confession needed to solidify a highly circumstantial case is questionable.

But investigators acknowledged that the evidence was highly circumstantial.

A highly circumstantial case, the "General Wayne Inn" murder has been the subject of numerous television portrayals.

To draw any broader conclusions, he said, would have been "highly circumstantial."

"The evidence is troubling, suspicious, but in the end highly circumstantial," Mr. Lieberman said.

The evidence against Mr. Blanton, by all accounts, is highly circumstantial.

Evidence linking Karr to the killing is highly circumstantial in nature.

My own evidence for that was highly circumstantial.

Investigators acknowledged that the evidence was highly circumstantial.

The account is highly circumstantial and comes from an unquestionably authentic source, and yet almost everything about it is very difficult to believe.