those detective guys

Are there any GOOD series of detective fiction novels that are set in the future (say around 2400 A.D.) using a wise older detective and a rather numb-skulled junior detective partner. I am particularly interested in the interplay and interpersonal relationships of the two detectives as they solve murders that cross social and economic boundaries (rich/poor, black/asian/white/, hetro/homo, elite/plebeian, human/android etc.). 

I have no interest in hard science fiction