Article continues below advertisementNew details are coming to light in the ongoing search for Savannah Guthrie's mother, Nancy Guthrie.According to a law enforcement source, the masked man suspected of abducting the 84-year-old may have been at her front door before February 1, the day she went missing. The individual was first seen in doorbell footage released to the public, but investigators now believe he had been at the property earlier than initially thought.Article continues below advertisementSource: FBIThe suspect may have visited the home before February 1.