Captain here.
I can confirm that things were going rather peacefully for the duration I was in round (Despite Max screaming bloody murder over sec comms about "Bogeys" and being outgunned equipment-wise when the raiders were first arriving), and that I had asked the visitors to keep weapons holstered and stow the rifle. I told them that they'd need a security escort for now (with plans to lift it later if they behaved), said they were free to walk around the public areas, and left it in the hands of sec and the interim HoS, since I don't want to micromanage while I have a capable head of staff. Though throughout the conversation, it was Longshot who seemed antsy to leave, and I can confirm that I saw what Nantei said about him emerging from maint with a gun.
Once we make agreements and I offer to cover the visitors' drinks for the duration of the shift, I go to make an update announcement for the crew. In the time it takes me to get to my office from the bar, I've already heard chatter of one of them trespassing (Which, according to Crystal's post, seems to have been Longshot), forcing me to make my announcement a little more of a warning than an update. Still, it goes well for a time. I ask the HoP to fax an update to central, along with a note that the scarab "raiders" are looking to trade, and requesting permission to do so. Security grumbles IC about my decision to let them tour the station, talking about making reports to CCIA, (IC drama, all good), and to their credit they don't escalate or fight with the visitors (And it was funny as hell listening to them trying to organize keeping watch).
Unfortunately, shortly after, I could not bear my migraine any longer, and went to cryo at around the hour mark IIRC. It's sad to hear the round devolved into violence, as the HoS and I worked very hard to try and enable them as much as we could ICly, and it seemed that everyone was enjoying themselves. There was no escalation towards a violent confrontation (especially of this scale) during my time in-round.