The defendant is presumed innocent. The Constitution provides defendants with the right not to be compelled to testify against themselves as well as to free and private access to counsel; however, the Government contended that the right to consult with attorneys is not absolute and can be restricted if such restriction is compatible with the spirit of the Constitution. Access sometimes was abridged in practice; for example, the law allows prosecutors to control access to counsel before indictment, and there were allegations of coerced confessions. Defendants are protected from the retroactive application of laws and have the right of access to incriminating evidence after a formal indictment. However, the law does not require full disclosure by prosecutors, and material that the prosecution does not use in court may be suppressed. Critics claimed that legal representatives of defendants did not always have access to all needed relevant material in the police record. A defendant who is dissatisfied with the decision of a trial court of first instance may appeal to a higher court.