Investigators in Arizona have detained a person for questioning in connection with the disappearance of Nancy Guthrie, the mother of "Today" show host Savannah Guthrie.

Tristan Rowe, 19, was found safe Monday after Pima County Sheriff's Department search. Get the latest details on the resolved missing persons case.

Nancy Guthrie's home is being treated as a "crime scene." Pima County Sheriff Chris Nanos said. He said the 84-year-old's family had reported she had no cognitive issues.

Investigators confirmed Friday a second message has been sent from possible kidnappers regarding missing Nancy Guthrie. As day six of the search unfolds, the FBI and Pima County Sheriff’s Department are testing what’s real and what isn’t. Vanessa Araiza has what's been confirmed so far, and what authorities still need from the public. STORY: #NancyGuthrie #Tucson #Arizona #MissingPerson #Abduction #FBI #PimaCountySheriff #TucsonNews #BreakingNews #KOLD13 #ArizonasFamily #SavannahGuthrie #TrueCrime #Reward #PublicTips For more Local News from KPHO: For more YouTube Content:

More than a week after the suspected abduction of the mother of "Today" show anchor Savannah Guthrie, authorities detained and released a person after questioning them.

Authorities in Pima County, Arizona, have acknowledged circulating reports of possible ransom notes linked to the disappearance of 84-year-old Nancy Guthrie, mother of NBC TODAY host Savannah Guthrie, while stressing that all such information is being thoroughly vetted. The Pima County Sheriff's Department released a statement after outlets like TMZ and local Tucson news reported receiving unverified communications demanding money for Guthrie's safe return.