In the Nancy Guthrie case, investigators have noticed a rise in tips from the public. This increase is attributed to the release of ransom notes. The decision to release the notes appears to have generated more leads for investigators to pursue.

Details about the content of the ransom notes and the nature of the tips are not specified in the available information. For further details on the Nancy Guthrie case and the investigation, readers can refer to the original report from FOX 5 Atlanta.