Not Alone
All of a sudden, they heard something- footsteps were approaching from the opposite direction. They realized someone else was down there, reality was sinking in. They were clearly not alone but they were ready and on standby.
What Was Down There
Officer Erwin knew it that moment, the tunnel was positioned specifically to go through the Mexican border. It was a direct entrance to Mexico. They finally reached a ladder with a trap door right above it, this was 600-yards later.