Ellen Boyd

Pima County investigators say Nancy Guthrie left behind her keys, wallet and phone and that traces of her blood were found at her Tucson area home.

For much of February, reporters and online content creators crowded the neighborhood, but since county officials imposed a temporary street parking ban near the home, neighbors say it has grown quieter.

Authorities continue to ask residents for surveillance video and tips.

The most significant development has been the recovery of security footage that shows an unidentified masked and armed person approaching Guthrie's doorstep the morning she disappeared.

Savannah Guthrie says the family is offering a $1 million reward for information leading to her recovery.

For NPR News, I'm Ellen Boyd in Tucson.