They did know that the van came into this country illegally. The van set off an alarm as it crossed into this country.
“Could you tell us what volume, page and line number this testimony is within the trial transcript?..... I’d like to read it.”
It starts in Volume 2012.pdf on page 159 Lines 5 - 16 Ramos testified he was at station for lunch, several sensor hits in the area (area 76)After that it went into some technical details of how the sensors worked, what Ramos did in response etc.