Authorities investigating the attacker of Teotihuacán found that he possessed a .38 caliber revolver valued at 40,000 pesos, ammunition, and other items. Investigators noted that the suspect's clothing and belongings referenced past mass shootings, suggesting the incident was not spontaneous.

Una de las armas que Julio César Jasso, el atacante de Teotihuacán, llevaba en su mochila, era un revólver con valor aproximado de 40 mil pesos. <p>El <a href="https://www.elfinanciero.com.mx/nacional/2026/04/21/autoridades-dan-detalles-de-julio-cesar-jasso-atacante-en-teotihuacan/" rel="noreferrer" target="_blank" title="https://www.elfinanciero.com.mx/nacional/2026/04/21/autoridades-dan-detalles-de-julio-cesar-jasso-atacante-en-teotihuacan/">atacante de Teotihuacán, Julio César Jasso</a>, de 2...