Teton County, Idaho Sheriff’s office is trying to locate a 16-year-old girl who has been missing since July 17. Kenia America Stack of Driggs was last seen by her mother when she was heading to work at Wendy’s in Jackson, Wyoming. However, her mother says she failed to return home after work that evening. Madison County Sheriff’s office found her vehicle parked under a tree with the keys left inside, Friday morning. The girl has also not been answering her phone since July 13th. Kenia’s mother believes the girl is trying to go back to Mexico. Sheriff’s officials are asking that anyone who may know or have contact with Kenia to contact them at 208-354-2323.