The search for Nancy Guthrie has now stretched into its third agonizing week, and the latest developments are as troubling as they are heartbreaking. Late Friday night, a dramatic federal operation unfolded miles away from the 84-year-old's home, sending shockwaves through the community and raising hopes that answers were finally within reach. But by Sunday, those hopes were tempered with reality. Related: What's The Deal With The Pool Cleaners At Nancy Guthrie's House? According to officials, the FBI executed a federal search warrant at a home in the Catalina foothills.