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Guzman-Mendoza was last seen in Tucson, Arizona on September 20, 2010. She left her job at the Mountain Oyster Club, a private dining club, in the vicinity of Speedway and Wilmot, at 8:30 a.m., just half an hour into her shift. She said she was felt sick and was going home. She normally took two buses to get between work and her home in the area of Ruthrauff and Interstate 10.
Guzman-Mendoza never arrived home and has never been heard from again. Authorities determined she did board the first bus, and that morning her cellular phone pinged off a tower at Curtis and Kain, about a quarter of a mile from home. This was the last sign of her.
Pima County Sheriff's Office