A Cancun local posted a picture of the toddler on Facebook to try to trace her family - but now her relatives believe it contains crucial evidence and could be a worrying clue about the fate of her mother.
Tahnee Shanks, 32, had travelled with her estranged husband Jorge Estudillo and their daughter Adelynn from their home in Merida to the tourist hotspot of Cancun on May 1.
Two-year-old Adelynn was found alone outside the chapel in Cancun on May 3, as authorities search for her mother Tahnee Shanks, 32, and dad Jorge Aguirre Astudillo who are both missing.
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