While William sold the idea of a Royal Trial to the King, Wolfe focused on the other gossip and conversations that were happening in the Palace. There were bound to be more people who knew, and many more who were loyal to one of the imprisoned Nobles, even if they didn't know what they had actually done.
Finding out what they were planning to get around the restrictions placed over the Palace to break the perpetrators out was vitally important, second only to controlling the message so that the Nobles and staff didn't manage to convince the Kingdom that they were actually innocent and being railroaded out of their positions.
The minimum penalty that they would be facing was being stripped of their positions and forced to repay the missing money, which most of them should be able to afford. The maximum was a public execution for Treason, since it was the Royal Treasury that they had stolen from by stealing the payroll and maintenance funds.