We simply need to increase the severity of punishment for poachers and traders
Severe punishments can backfire. Judges demand better evidence to successfully prosecute such cases and are more likely to dismiss them if evidence is flimsy. High penalties are useless if the probability of getting caught and convicted is low. The best deterrents for poachers are 1) early detection before they even get to a rhino and 2) a lower market price for rhino horn.