Who...
... forced the window open in the Red Lipstick Murder (first homicide case)?
(just a warning, I suppose there may be spoilers below for anyone who hasn't completed the homicide desk.)
I love this game, although I am well aware of its flaws, and I've just played it through for a second time. Many cases and plot points leave unanswered questions (which i suppose fits in with the noir style).
But one that really bugs me is that when you go to Celia Henry's house in the first homicide case, Rusty finds that someone has broken in by breaking the window. Once you're inside, if you look at the broken glass, Phelps says it was clearly forced with a blunt instrument (or something to that effect).
And then, as far as I can remember, it never gets mentioned again, or at least not explained, either in this case or after you eventually catch the serial killer.
Playing the homicide desk for a second time, with knowledge of what is really going on, makes it easy to spot how the actual killer planted the evidence on the people you then go on to arrest (e.g. in this case the condemning evidence in the suspect's flat is just inside an open, easily accessible window). But as far as I can remember, there is no reason for the actual killer to have broken in to the victims house to frame other people for the murder.
So, who was it that broke in and why?
p.s sorry for the long read (if you bothered!) but when you have a pain-in-the-arse problem, i guess the plea for help comes out in a pain-in-the-arse way...