In
trials, while one side tries to prove the guilt of the other side,
which is prosecution, the other side tries to prove its innocence, the
defence. Both sides strive to construct their own stories in a
consistent way around the evidences. Each side can have different
strategies in the constructing of their stories but story of the
prosecution must involve presence, action and state of mind to prove the
guiltiness of the defendant with evidences. In return to this, defence
struggle to challenge or deny presence, action or state of mind which
has demonstrated by the prosecution.