Just got around to reading SoSS, thank you for sending it. I enjoyed the story overall, although probably not as much as ‘Beta Three Leader’ to be honest.
I thought the Scots accent worked pretty well, although I've suggested a couple of substitutions in the comments that I emailed. I don't think 'fellers' works with Scots, I would go with 'guys'. 'Hen' is a term for a woman, so I assumed that Kennedy was baiting Flynn when she used it.
I too liked the fact that, for most of the story, Flynn was unarmed, and that you played that up in places. I liked his hard-bitten attitude, and his swearing, although I thought he lacked control in some instances, which I surprised me a bit for a hard bitten cop, and that he could have been sharper at one of two points. I suppose he was under a lot of stress, but I felt as if this was his normal state, since we had not really seen him in his past.
There were one or two aspects that I found puzzling. I didn't see how Flynn could make the assumption about the absence of a physical relationship between McCray and Annie based on the unused condoms that he found in the flat, they might simply not have been using protection. Also, I'm not sure a firearm would have a light on it that would give away to most opponents that it was empty of charge (if the light was not illuminated).
The story has a good arc, and a satisfying ending, but perhaps not particularly surprising (not that it has to be, I suppose). I think it can be a problem for 'murder mystery' type plots, you pretty much have to have the villain come from the characters that the reader has met in the course of the story, and there probably isn't much opportunity for misdirection in such a short piece.
I think my biggest issue was the narrative style, and the fact that it was not anonymous or 'invisible', but had the same slang / colloquial style as Flynn. I think a plainer and more grammatically correct narrative style would emphasise the energy of the dialogue more, but that's just my opinion.
Looking forward to you submission on Monday!