They are rarely read any instruction on the law, as this is not a requirement; their job is only to judge on what the prosecutor produced. The prosecutor drafts the charges and decides which witnesses to call. The prosecutor is not obliged to present evidence in favor of those being investigated. Individuals subject to grand jury proceedings "do not" have a Sixth Amendment constitutional right to counsel in the grand jury room, nor do they have a Sixth Amendment right to confront and cross-examine witnesses. Additionally, individuals in grand jury proceedings can be charged with holding the court in contempt (punishable with incarceration for the remaining term of the grand jury) if they refuse to appear before the jury. Media coverage is not allowed. Furthermore, all evidence is presented by a prosecutor in a cloak of secrecy, as the prosecutor, grand jurors, and the grand jury stenographer are prohibited from disclosing what happened before the grand jury unless ordered to do so in a judicial proceeding. In 1974 the Supreme Court of the United States held in "U.S. v. Calandra" that "the exclusionary rule in search-and-seizure cases does not apply to grand jury proceedings because the principal objective of the rule is 'to deter future unlawful police conduct,' ... and 'it is unrealistic to assume that application of the rule to grand jury proceedings would significantly further that goal.'" Illegally obtained evidence, therefore, is admissible in grand jury proceedings, and the Fourth Amendment's exclusionary rule does not apply. After a grand jury was commissioned to investigate whistleblowers organization WikiLeaks, grand juries have been accused of being used as an intimidation and persecution mechanism against whistleblowers who have been accused of leaking classified information. According to the American Bar Association (ABA), the grand jury has come under increasing criticism for being a mere "rubber stamp" for the prosecution without adequate procedural safeguards. Critics argue that the grand jury has largely lost its historic role as an independent bulwark protecting citizens from unfounded accusations by the government. Grand juries provide little protection to accused suspects and are much more useful to prosecutors. Grand juries have such broad subpoena power that they can investigate alleged crimes very thoroughly and often assist the prosecutor in his or her job. Grand juries sometimes compel witnesses to testify without the presence of their attorneys. Evidence uncovered during the grand jury investigation can be used by the prosecutor in a later trial. Grand jurors also often lack the ability and knowledge to judge sophisticated cases and complicated federal laws. This puts them at the mercy of very well trained and experienced federal prosecutors. Grand jurors often hear only the prosecutor's side of the case and are usually persuaded by them.