Cross-country road trip turns into nightmare for missing Tennessee woman.

Missing Cheatham County woman, Nikki Alcaraz, was possibly spotted at a Walmart in Redding, California over Memorial Day weekend. Authorities are still asking for the public's help in finding her. Nikki had set out on a cross-country trip with her boyfriend and a dog to visit family in Orange County, California. During their trip, the couple had a run-in with law enforcement in Torrance County, New Mexico, where a witness saw the boyfriend punch Nikki in the face. Neither of them wanted to press charges, and Nikki was dropped off in Moriarty, New Mexico, where she called her sister. The fear over Nikki's disappearance has been heightened by some eerie similarities to the high-profile Gabby Petito case.