NASHVILLE, Ga. -- A man wanted in a Tennessee kidnapping that spawned a nationwide Amber Alert is now on the state's 10 most wanted list facing new charges.

Police believe 50-year-old Tad Cummings kidnapped the 15-year-old Elizabeth Thomas and is armed.

Wife of man accused of kidnapping Tenn. teen pleads for her return

Nashville NBC affiliate WSMV said Cummings now faces new charges of aggravated kidnapping and sexual contact with a minor.

During a press conference on Friday, Cummings's wife urged him to return home and said that she was heartbroken for the family of the teen - not seen since Monday. Officials fear she is in imminent danger. As of Friday, however, officials had received no credible reports of sightings.

Officials believe the two are traveling in a silver 2015 Nissan Rogue with a Tennessee license plate reading 976-ZPT. Anyone who sees the vehicle is urged to call 911 or 1-800-TBI-FIND.