What was the payoff for failing to stop the others???

Mexican authorities stop caravan No. 5; US plans asylum policy change

"A fifth caravan of Central American migrants was stopped in its tracks yesterday by immigration agents and Federal Police after illegally crossing Mexico’s southern border.

A group of more than 300 people, mostly from El Salvador, arrived in the Guatemala border town of Tecún Umán earlier this week and yesterday morning waded across the Suchiate river to begin the long journey through Mexico to the United States border.

But the migrants only made it as far as Metapa, a town 18 kilometers north of the border, before they were intercepted by National Immigration Institute (INM) agents and anti-riot police. ...."

https://mexiconewsdaily.com/news/mexican-authorities-stop-caravan-no-5/