His crime is that he has forceably taken the kidney of poor people without their concern,though he paid them afterwards but imagine if the same incident would have been happened with u aur some-one from your family,would your opinion be the same at that time also. No one can force anybody to give there organs/body parts,and naming them as DONATION. Dontion means willfully giving whatever u want to give. So in that context he has done a crime.