From Fox News:
Newly released FBI video in the search for Nancy Guthrie is offering a “wealth of information” that could help identify the subject seen in the footage, according to a body language expert who says the images reveal key physical and behavioral clues even with the individual wearing a mask. Susan Constantine, who reviewed the newly recovered images, told Fox News Digital the footage shows details that stand out immediately from a behavioral standpoint.
According to Constantine, the subject’s jawline appears puffy, which she said could indicate beard hair beneath the mask. She also said the subject’s head shape and lack of visible hair suggest the individual may be bald.