Why do the men believe that they will be killed?

Manolo is depressed and tells Minerva to find out who is left in their movement in the area. But a few days later, Elsa brings news that a group of young men has been caught distributing revolutionary leaflets in Santiago. Trujillo is cracking down out of panic, and Captain Pena reports that the women can no longer visit their husbands at La Victoria until the end of September. When they do return to the prison, Manolo believes that he and the other political prisoners are going to be killed, and he tells Minerva, "It's over for us."