India, Feb. 7 -- Nancy Guthrie's high-profile disappearance case has entered its sixth day mark with no publicly confirmed motive for her apparent abduction by law enforcement.

However, a retired FBI agent has weighed in on a possible motive behind Savannah Guthrie's mother's abduction. He described the nature of abduction as "very strange," given the way the captors allegedly tried to contact the family via media.

Former FBI supervisor agent James Gagliano described the circumstances of Guthrie's kidnapping as strange and noted that the "most compelling piece of evidence thus far" is the ransom message requesting Bitcoin payments, Daily Mail reported.

Gagliano said that there are two noted reasons for a kidnapping to take place. "It's...