Based on the evidence you collected, Captain Brackenbrook has ordered the capture of Calder Cob.
Captain Brackenbrook wants you to head to the jails and glean what information you can from Calder Cob.
'Thank you for your efforts in uncovering this mess thus far. I would like to ask you to follow up on your investigation by looking in on the prisoner, Calder Cobb.
'Head to the jails, just to the east of this building and speak with Ned Pruner. He'll be your point of contact.'
Ned Pruner is in the jails to the east of Captain Brackenbrook's location.