In my childhood I read an SF story about an assassin (and/or thief?) who successfully completes an assignment (murder?) at the beginning of the story. Upon coming back to his home/apartment he notices something unusual (I think he believes he is being set up/tried to be getting rid of?) and leaves. He then starts a number of carefully pre-planned actions to deal with such a case, eliminating the threats to him, transferring money/funds, etc and setting up a new identity (as far as I remember). I do not remember how the story continues but have a vague believe that it takes on a completely different direction from that on?
The name of the protagonist might possibly be "Kees van Lee-Locklin" or something similar, maybe? I could not find anything regarding that name, so am not sure if I am not mixing up things, though...
