The suspect in the disappearance of Nancy Guthrie appears to have been at her front door prior to the night she went missing, a law enforcement source has told the BBC's US partner CBS News.
The 84-year-old mother of NBC News anchor Savannah Guthrie was reported missing on 1 February, having disappeared from her home in Tucson, Arizona, the night before. Police believe she was abducted.
The FBI previously released doorbell camera footage showing a masked person carrying a backpack, who it said was investigators' prime suspect.
The source told CBS that the same man was on her doorstep on another occasion. However, local police have not confirmed that the appearances were on different days.
The broadcaster carried images, credited to the FBI, that appear to show a masked man, this time without a backpack, which were captured by Guthrie's Nest doorbell camera sometime prior to the date of the suspected abduction.
