A notebook belonging to 'Milynali Red' search group founder Graciela Perez lays open on a page showing a sketch of a bone in Tamuin, San Luis Potosi, Mexico, July 28, 2019. Perez founded 'Milynali Red', a collective of families who help in the search for missing people, after her daughter Milynali disappeared in 2012 while driving home from Houston. REUTERS/Mahe Elipe