Nancy Guthrie has been missing for two months as investigators seek answers.

Nancy Guthrie, 84, disappeared from her Tucson home on Jan. 31; the FBI and local law enforcement have gathered surveillance footage and DNA evidence but have not announced a suspect.

Nancy Guthrie, an 84-year-old Tucson resident and mother of TV host Savannah Guthrie, was last seen at her home on Jan. 31. Local and federal investigators have treated the house as a crime scene and have collected forensic and surveillance material. The Guthrie family has made public appeals and increased a reward for information. Two months on, authorities have not named a suspect and the family continues to press for leads. Known details: - Nancy Guthrie disappeared from her Catalina Foothills home on Jan. 31 and did not return as expected the next morning. - Family members, including Savannah Guthrie, have made public pleas and the family increased a reward for information. - The FBI joined the Pima County Sheriff's Department and investigators have sought surveillance footage and submitted forensic samples, including DNA, for testing. - Authorities have released some porch surveillance images and say the investigation remains active, but no suspect has been publicly identified. Summary: The disappearance has left the family and community awaiting clearer answers while investigators continue to pursue leads and process evidence. Undetermined at this time.