Rov - “The miscarriages of justice have been too numerous in recent years and shows a flaw in the system. Whatever can be improved deserves some attention.”
I agree with that statement. Anything that is proven to assist in the reduction of miscarriages of justice can only be a good thing.
But as Rojash pointed out, the use of polygraph test will not improve the situation as they are no more reliable as a test of one's truthfulness as graphology is a test of one's personality. Numerous studies carried out in many different countries have shown that polygraph tests are effectively evidentially worthless and come with a high risk of producing false positives. Therefore there use in criminal proceeding is more likely to cause miscarriages of justice than it is to rectify them.
http://en.wikipedia.o...ki/Polygraph#Validity