The adversarial system of trial
The word ‘adversary' means 'opponent'. In a trial the two sides of the case try to prove their version of the facts and disprove the version of the other side. The defendant in a criminal trial does not have to prove
anything, as he or she is assumed to be innocent until proven guilty. However, most people accused of a crime will retain the services of a legal team to show how the prosecution's case is flawed.