Complete the table with suitable words.
1. A person who has seen something wrong is a____ 2. A state of uncertainty about something that is undecided or not yet known. 3. A small detail that can help the investigator. 4. To prove that he is innocent, the suspect needs a good____ 5. The place where the crime was committed is the____ 6. What a witness tells the police is called a____ 7. A person who investigates is a____ 8. The police can only accuse the suspect if they have____ 9. Something which cannot be explained or understood. 10. It’s easier to understand what happened when it is found. 11. They are left by the murderer on different objects and can help identify him. 12. A person, thing or idea regarded as possible danger.