Alicia Cooney

Investigators could be seen recanvassing the property and spending a lot of time on the roof of the home.

Both Pima County sheriffs and the FBI were on scene.

Drone footage shows agents removing what looked like a mounted and wired device from the side of the home.

This activity came not long after the Sheriff's Department said it was aware of a second note sent to a local TV news station, KOLD, here in Tucson.

And while the station could not reveal its contents, they did say that it did not have proof of life of Nancy Guthrie.

The Sheriff's Department also towed this blue Subaru from Nancy Guthrie's home,