"The intranet works still, right? We could try setting up webcams. Or even better, a network of traveling video cameras hooked to a unit not even connected to the ship for video surveillance. It'll take a lot of cable, but it can be done." He'd seen the techies do it on stake outs.
Hell, there was a shop on the promenade full of electronic equipment for the tech savvy traveler. "If you can read that code, I've every faith you can jury rig a video network leaving the ship's computer system out of it." Sean met Riffraff's eyes. "Well get you whatever manpower help you need. There should be enough equipment."
Computer security went beyond just surveillance cameras, but those would help keep wherever they centralized the people well monitored.
Sean wasn't all that surprised by the second false manifest. He had a hand written list of people he knew were missing from reports by neighbors, or from their lack of response to the morning check, and no other sightings.