India, April 14 -- It has been more than two months since Nancy Guthrie disappeared from her home in Tucson, Arizona. No major lead has emerged, nor has there been any arrest in the case as investigators continue searching for the 84-year-old.

But interest in the case has far from diminished. Savannah Guthrie's fame as the host of Today show, and the mystery surrounding the disappearance have ensured that the case is closely followed by many despite having almost gone cold.

Recently, a former FBI agent has come up with a theory around Nancy Guthrie's disappearance that proposes a simpler approach to unlocking the whodunit.

Jennifer Coffindaffer, former FBI agent who livestreams her opinions and analysis on popular criminal cases, spoke...