Arizona investigators said Thursday that authorities have not yet identified a person of interest in the disappearance of 84-year-old Nancy Guthrie and announced a $50,000 reward for information leadi...

Guthrie, 84, was reported missing Sunday afternoon from her home outside Tucson, Arizona, after she did not show up at church.

“We have nothing else to go on but the belief that she is here, she’s present, she’s alive, and we want to save her,” Pima County Sheriff Chris Nanos told “Today” correspondent Liz Kreutz in a Wednesd...