Overview
- The demonstration partially closed Avenida de la Industria in Altamira from about 7:30 a.m., leaving one lane open and easing by midday.
- Relatives contend authorities have tied field searches to new phone movement and urge state and federal agencies to intensify actions.
- Contact was lost on October 20, the phone briefly powered on that day and again on October 21 in Aldama, and no further signal was detected.
- The family reconstructed portions of his route using surveillance and geolocation and submitted the findings to prosecutors in Mexico City and Tamaulipas.
- Miguel Darío Becerra Chávez is a fifth‑year Naval Medical School cadet from Mexico City whose trip was unexpected, and Semar lists him among 57 missing marines.