1. What is anthrax? How was anthrax used in the crimes?
2. When examining the anthrax, what did scientists find?
3. The scientists were both helping with the investigation and suspects in the investigation. What issues might this create for a criminal investigation?
4. Who was Mr. Z? How did reporters and investigators react to their belief that he was mailer? What was found?
5. What was the situation five years after the crime?
6. Who did the FBI next focus on as a suspect? What evidence did they base this on? What problems are there with this evidence?
7. What did the FBI find when they searched Ivins' home and office? How did these findings complicate the case?
8. What happened to Ivins? Was the FBI to blame for this?
9. When the FBI gave it's evidence to an independent lab, what did this lab find? What problems does this have for the FBI's case against Ivins?
10. According to critics, what are the mistakes that the FBI and other investigators made in the anthrax case? Why might these mistakes have been made?