Under the American constitution,in theory criminals are innocent until proven guilty,are entitled to a speedy trial,may refuse to answer self-incriminating questions,and are entitled to representation by a lawyer.

• 美国宪法规定，在理论上，犯人在证明有罪前是无罪的，犯人有权尽快受到审判，可以拒绝回答使自己获罪的问题，有权请律师。