Over half this chapter was wasted on them interrogating one guy.
That could've taken 2 pages at most, leaving 8 of the 10 for actual meaningful progression.
Theres so much filler in such small chapters that its no wonder its taken 73 chapters to get "this far".
Such a good story concept is being completely wasted here, like a starving child being dripfed fed just enough to keep it alive.