There was no proof of life, and no further demands apparently.
There was also this report, which I found interesting. It has been posted a bunch, but it's easy to miss with this thread going so fast:
Police probing leads about a vehicle
+2
Tom Winter,
Andrew Blankstein and
Chloe Atkins
Law enforcement officials in Arizona are searching for a vehicle or vehicles that may be connected to the Nancy Guthrie investigation, NBC News has learned.
A Circle K spokesperson told NBC News that law enforcement visited one of their stores on Oracle Road in Tucson after “receiving a tip regarding a vehicle of interest, and our team has provided them access to the store’s surveillance video.”
Officials haven’t said if the vehicle or vehicles are definitively connected to any part of the crime, or if that lead has since evaporated.