While heading down the prison stairs to the prisoner, the coms begin cutting out. One of the soldiers report that the "interrogation is going underground". Then, contact is lost as they descend stairs. Suddenly, they enter the interrogation room, and the sun is seen streaming in through multiple windows.
The guard is outside the prison and is about to be ganked by the gun thugs. He is forced back inside by the sniper and he meets Dalton a short distance inside the door. Instead of Dalton bringing his people out the way the guard came in, they stay inside the prison and try to get out another way. They could have easily gone back out the way the guard came in and then escaped.