Local search group founder Mirna Medina, 52, whose group 'Las Rastreadoras del Fuerte' is named after the place where the women made their first significant find, takes a call in a restaurant in Los Mochis, Mexico, July 12, 2019. A former preschool teacher, Medina said she was forced to retire early to search after authorities were unable to locate her son Roberto, who went missing July 14, 2014, aged 21. REUTERS/Mahe Elipe