India, June 3 -- The FBI has been planning to bring new tech tools into the investigation into Nancy Guthrie's disappearance, sources told Fox News Digital over the weekend. An expert believes that this move could finally expose the suspect.

While the FBI did not elaborate on the tools, Morgan Wright, the CEO and founder of the National Center for Open and Unsolved Cases, has said that he believes the tools are likely focused on one of three areas.

"The solution to this case is going to be, I think, something technical, something that they come up with - new ways of analyzing data," he told Fox News Digital. "I'm looking at the video, the video forensics, signals analysis, blockchain kind of stuff."

Video forensics could include techno...