While watching a confrontation was entertaining, Benjamin wasn't here for a show.
In order to uproot the cult entirely, he needed the help from Ferelden authorities. While he could just wait patiently and let the Mages Freemasonry deal with the officers, it would probably be more efficient if he took charge of it himself.
After intentionally provoking the few soldiers on the streets, he ended up being arrested and sent to a basement interrogation room, just as he desired.
All things accounted for, Benjamin was still unsettled with his plan. What if the knight that arrested him was a complete idiot? What if the knight doesn't actually do his job and ends up being of no help?
Plus, who was he to demand help just like that?
Hence Benjamin waited patiently and silently in the basement. The knight in charge never showed up. Instead, a bureaucrat named Mikel showed up faster than anyone else.
