How is it sufficient? Sufficient for what? Do you think that their end goal is to get a charge, any charge, on this mid level dealer? Of course not; they want information on someone even more high level.
The penalty for 1 oz and destroying evidence (if they can prove that) is nothing compared to the penalty for 1 kg.
The penalty for 1 oz and destroying evidence (if they can prove that) is nothing compared to the penalty for 1 kg.