The Dangerous Marlo

In the space, there were over 20 guards seated behind computers and desks working tirelessly on heaven knows what: 10 to the left and 10 to the right.

In the forefront of the room were similar machines seen in the ports, and even in the security room they first passed through when entering the prison building.

Why were they doing the same check over and over again? 

"Leave your belts, shoes, and all metal and electronic pieces behind."

All 6 men suddenly felt insulted thinking these people were giving them hard times on purpose, but Rowen and the other guards didn't bother explaining. These were the visitor rules for this sector. 

If they want to see Marlo, they must do as told. 

All 6 men passed through the scanning machine, ensuring no metal followed them.

This was also to protect the guards escorting them down since for all they knew, these people might have something devious planned out.