Hrystyna Garkavenko, the 19-year-old daughter of a priest, set up a cellphone camera in his church to livestream Ukrainian troop movements. She’s one of thousands accused of spying for Russia.

A vulnerable victim, an unknown perpetrator and a recognizable celebrity are all factors in a case that has captivated the public.

Nancy Guthrie, the mother of "Today" show co-host Savannah Guthrie, was reported missing on Feb. 1 and ransom notes were being investigated.

Authorities questioned a man about the disappearance of Nancy Guthrie, hours after the release of video of a masked person on ...