The 4th and 6th amendments. Why are they necessary to the criminal justice system?

Question

Identify two areas or situations in the modern world that could be benefit from a clarification or modification of these rights.

Once identified can you please describe the issues and modifications you would recommend along with your justification.

It might help if you start by reading them:

http://www.superkids.com/aweb/pages/features/net/amndmnts.htm

After that, you can begin to develop your thoughts and post them here for a critique.

Matt