Stephen said:
Having tried and failed myself I suggest that one reason may be because writing a good Detective story is damned difficult !
Writing a good ANYTHING is damned difficult.
A more fundamental reason may be that Detective stories tend to take place in a society where murder is a crime and not a tool of statecraft.
But even offhand I can think of at least a dozen detective stories exploring this very point--e.g., Gorky Park and SS/GB. (It is not a
coincidence that MtD takes place on a neutral spacecraft belonging to a society where the rule of law still holds). Most murders in B7 take place in the open.
And, of course, murder is not the only possible crime-- I'm sure everyone would take an interest if the contents of the Treasure Room disappeared, for instance (sort of like And Then THere Were None, with money instead of bodies?)
-(Y)