Sergeant Yates then joins Butters ' company but Yolanda 's pimp , Keyshone appears outside and asks Yolanda to marry him and ( s ) he says yes . Sergeant Yates , still undercover , seeks employment with Butters . But Yolanda 's pimp , Keyshone , soon appears outside and begs for `` Yolanda '' back , asking for her hand in marriage .