Now that you’ve investigated all the case files (or at least most of them), you now have the chance to arrest all 10 suspects for the crimes they’ve committed. Each challenge will have five questions, which must be answered correctly to get your “Book ‘em Certificate.” By arresting all the suspects, you'll have proof that you’ve gained a better understanding of aquatic invasive species and what’s being done to prevent their spread— especially what YOU can do to help solve this problem.