MEXICO CITY, Mexico — In a significant development surrounding one of Mexico’s most notorious political assassinations, authorities have apprehended Jorge Antonio Sanchez Ortega, a former intelligence agent suspected of involvement in the 1994 killing of Luis Donaldo Colosio, the then-presidential frontrunner. The arrest, which took place in Tijuana, Baja California, on Saturday, marks a renewed effort to unravel the decades-old mystery that has haunted the nation. Colosio, the Institutional Revolutionary Party (PRI) candidate, was fatally shot during a campaign rally in Tijuana on March 23, 1994. His murder, which occurred weeks after he publicly criticized the corrupt establishment within his own party, is widely regarded as a turning point in Mexican political history. While Mario Aburto Martinez was convicted as the sole perpetrator and remains incarcerated, questions persist about who orchestrated the assassination. Sanchez Ortega, who was briefly detained and released shortly after the incident, was reportedly employed by the Center of Investigation and National Security (CISEN), Mexico’s counterpart to the US Central Intelligence Agency at the time. Authorities have yet to disclose whether new evidence prompted the arrest, leaving the public to speculate about potential breakthroughs in this long-standing case.