What is the best evidence rule? Explain in detail, law homework help

What is the best evidence rule? Explain in detail.
- Why was the best evidence rule implemented into the U.S. court system? Explain.
- What is the rationale behind its application?
Review the following cases with regard to wiretapping:
- Olmstead v. United States
- Nardone v. United States
- Goldman v. United States
- Berger v. New York
- Katz v. United States
Summarize the current status of wiretapping restrictions according to the reviewed cases above.
How must evidence derived from wiretapping be packaged and preserved? Explain.
How does wiretapping evidence relate to the “fruit of the poisonous tree” doctrine? Explain.
What is the likely outcome of your case in court if the originals are not located? Explain.