Narcotics Division Dave is a member of the police force.
if you give him 3-4 bags of Coca, he will reward you with Good Karma and a Mobius Strip.
He says this when you talk to him:
"Good day, sir. It's my job to keep the streets clean of any illegal narcotics... it's not easy. You can do your part by bringing in any you find, and we will dispose of them accordingly."