A corpse disguised: Dressed for Death by Donna Leon.

     Donna Leon. Dressed For Death (1994) The dead man seems to be a transvestite whore. But he’s really a bank manager, very respectable. Brunetti and his team uncover subtle inconsistencies which show that the dead man was not what he dressed up to be. But corruption at the highest levels of Venetian society prevent a simple arrest. Additional murders almost obscure the trail completely, until a random accidental witness undoes the protective charade the criminals have devised.
Well plotted, nicely done ambience, and a believable because flawed cop make for a good entertainment. I like the Brunetti books and am happy whenever I find one in a 2nd-hand book store. There are fewer and fewer of those, unfortunately. Recommended. ***