keep in mind, NONE of the Army guys that went to the Jail had ever seen Scratch, Tardust, or any other Mallers. (right?...)
i'm sure they know OF the Mallers and Scratch in particular, but to just start shooting a "Normal" without a conversation happening seems unlikely.

i can see the Mallers taking advantage of a "first encounter" with Puck and the Boys.
and i'm starting to believe that Puck is just assuming that all the others are dead, be the scenario of 'shots fired and no response' or be the Mallers/Ink/Randy getting the drop on them and hauling Robbins/Carl/Muldoon away.