United Kingdom, Feb. 24 -- Police found "no evidence" the suspect visited Nancy Guthrie's home before the day of her disappearance.

The 84-year-old mother of Today show star Savannah Guthrie went missing near her home in Tucson, Arizona on February 1, and Pima County Sheriff Chris Nanos has dismissed reports that a masked man seen on doorbell camera footage was spotted at the house at an earlier date.

Nanos told PEOPLE magazine: "There is no evidence to support that. and there is no evidence to support it was all on the same day.

"It is speculative at best and remains part of an ongoing investigation."

However, Nanos conceded that the masked suspect may have returned on a different day, as he's seen without a backpack or gun in one of...