Merlo, who claims it was a kidnapping orchestrated by SIDE, had traveled to Mexico to meet with Mexican politicians of the PRD, who were cooperating in an international push to free the guerrillas responsible for the La Tablada attack who were, and still are, serving prison term in Argentine jails. Merlo arrived in the Mexican capital with a fake Uruguayan passport, where he soon realized that the Mexican security forces were following him. He thought they were just doing basic surveillance on him to see if he was doing any illegal activity in Mexican territory.