A North Korean man arrested in a hotel in Dar es Salaam in possession of 500 elephant tusks will stand trial this week on charges of unlawful possession of the ivory and intent to trade it. Observers note that arrests of traffickers in Tanzania are not consistently followed up with careful investigation and effective prosecution. "Follow up investigations, including with international agencies and relevant stakeholders, are the key to unlocking data about the transnational actors, methods and routes involved in ivory trafficking and poaching dynamics," said Rachel Mackenna, from the Environmental Investigation Agency.