Perjury is the intentional act of swearing a false oath or falsifying an affirmation to tell the truth, whether spoken or in writing, concerning matters material to an official proceeding.[A] Contrary to popular misconception, no crime has occurred when a false statement is (intentionally or unintentionally) made while under oath or subject to penalty. Instead, criminal culpability attaches only at the instant the declarant falsely asserts the truth of statements (made or to be made) that are material to the outcome of the proceeding. For example, it is not perjury to lie about one's age except if age is a fact material to influencing the legal result, such as eligibility for old age retirement benefits or whether a person was of an age to have legal capacity.
Perjury is considered a serious offense, as it can be used to usurp the power of the courts, resulting in miscarriages of justice. In the United States, for example, the general perjury statute under federal law classifies perjury as a felony and provides for a prison sentence of up to five years. The California Penal Code allows for perjury to be a capital offense in cases causing wrongful execution. Perjury causing the wrongful execution of another is normally punishable by death in countries that retain the death penalty. Perjury is considered a felony in most U.S. states as well as most Australian states. In Queensland, under Section 124 of the Queensland Criminal Code Act 1899, perjury is punishable by up to life in prison if it is committed to procure an innocent person for a crime that is punishable by life in prison. However, prosecutions for perjury are rare. In some countries such as France and Italy, suspects cannot be heard under oath or affirmation and so cannot commit perjury, regardless of what they say during their trial.
The rules for perjury also apply when a person has made a statement under penalty of perjury even if the person has not been sworn or affirmed as a witness before an appropriate official. An example is the US income tax return, which, by law, must be signed as true and correct under penalty of perjury (see 26 U.S.C. § 6065). Federal tax law provides criminal penalties of up to three years in prison for violation of the tax return perjury statute. See:
Statements that entail an interpretation of fact are not perjury because people often draw inaccurate conclusions unwittingly or make honest mistakes without the intent to deceive. Individuals may have honest but mistaken beliefs about certain facts or their recollection may be inaccurate, or may have a different perception of what is the accurate way to state the truth. Like most other crimes in the common law system, to be convicted of perjury one must have had the intention (mens rea) to commit the act and to have actually committed the act (actus reus). Further, statements that are facts cannot be considered perjury, even if they might arguably constitute an omission, and it is not perjury to lie about matters that are immaterial to the legal proceeding.
Perjury law by countryEdit
The offence of perjury is codified by section 132 of the Criminal Code. It is defined by section 131, which provides:
(1) Subject to subsection (3), every one commits perjury who, with intent to mislead, makes before a person who is authorized by law to permit it to be made before him a false statement under oath or solemn affirmation, by affidavit, solemn declaration or deposition or orally, knowing that the statement is false.
(1.1) Subject to subsection (3), every person who gives evidence under subsection 46(2) of the Canada Evidence Act, or gives evidence or a statement pursuant to an order made under section 22.2 of the Mutual Legal Assistance in Criminal Matters Act, commits perjury who, with intent to mislead, makes a false statement knowing that it is false, whether or not the false statement was made under oath or solemn affirmation in accordance with subsection (1), so long as the false statement was made in accordance with any formalities required by the law of the place outside Canada in which the person is virtually present or heard.
(2) Subsection (1) applies, whether or not a statement referred to in that subsection is made in a judicial proceeding.
(3) Subsections (1) and (1.1) do not apply to a statement referred to in either of those subsections that is made by a person who is not specially permitted, authorized or required by law to make that statement.
As to corroboration, see section 133.
Mode of trial and sentence
A person who, before the Court of Justice of the European Communities, swears anything which he knows to be false or does not believe to be true is, whatever his nationality, guilty of perjury. Proceedings for this offence may be taken in any place in the State and the offence may for all incidental purposes be treated as having been committed in that place.
England and WalesEdit
(1) If any person lawfully sworn as a witness or as an interpreter in a judicial proceeding wilfully makes a statement material in that proceeding, which he knows to be false or does not believe to be true, he shall be guilty of perjury, and shall, on conviction thereof on indictment, be liable to penal servitude for a term not exceeding seven years, or to imprisonment . . . for a term not exceeding two years, or to a fine or to both such penal servitude or imprisonment and fine.
(2) The expression "judicial proceeding" includes a proceeding before any court, tribunal, or person having by law power to hear, receive, and examine evidence on oath.
(3) Where a statement made for the purposes of a judicial proceeding is not made before the tribunal itself, but is made on oath before a person authorised by law to administer an oath to the person who makes the statement, and to record or authenticate the statement, it shall, for the purposes of this section, be treated as having been made in a judicial proceeding.
(4) A statement made by a person lawfully sworn in England for the purposes of a judicial proceeding-
- (a) in another part of His Majesty’s dominions; or
- (b) in a British tribunal lawfully constituted in any place by sea or land outside His Majesty’s dominions; or
- (c) in a tribunal of any foreign state,
shall, for the purposes of this section, be treated as a statement made in a judicial proceeding in England.
(5) Where, for the purposes of a judicial proceeding in England, a person is lawfully sworn under the authority of an Act of Parliament-
- (a) in any other part of His Majesty’s dominions; or
- (b) before a British tribunal or a British officer in a foreign country, or within the jurisdiction of the Admiralty of England;
a statement made by such person so sworn as aforesaid (unless the Act of Parliament under which it was made otherwise specifically provides) shall be treated for the purposes of this section as having been made in the judicial proceeding in England for the purposes whereof it was made.
(6) The question whether a statement on which perjury is assigned was material is a question of law to be determined by the court of trial.
The words omitted from section 1(1) were repealed by section 1(2) of the Criminal Justice Act 1948.
A statement made on oath by a witness outside the United Kingdom and given in evidence through a live television link by virtue of section 32 of the Criminal Justice Act 1988 must be treated for the purposes of section 1 as having been made in the proceedings in which it is given in evidence.
Section 1 applies in relation to a person acting as an intermediary as it applies in relation to a person lawfully sworn as an interpreter in a judicial proceeding; and for this purpose, where a person acts as an intermediary in any proceeding which is not a judicial proceeding for the purposes of section 1, that proceeding must be taken to be part of the judicial proceeding in which the witness’s evidence is given.
Where any statement made by a person on oath in any proceeding which is not a judicial proceeding for the purposes of section 1 is received in evidence in pursuance of a special measures direction, that proceeding must be taken for the purposes of section 1 to be part of the judicial proceeding in which the statement is so received in evidence.
The definition in section 1(2) is not "comprehensive".
The book "Archbold" said that it appears to be immaterial whether the court, before which the statement is made, has jurisdiction in the particular cause in which the statement is made, because there is no express requirement in the Act that the court be one of "competent jurisdiction" and because the definition in section 1(2) does not appear to require this by implication either.
The actus reus of perjury might be considered to be the making of a statement, whether true or false, on oath in a judicial proceeding, where the person knows the statement to be false or believes it to be false.
Mode of trial
A person convicted of perjury is liable to imprisonment for a term not exceeding seven years, or to a fine, or to both.
The following cases are relevant:
- R v Hall (1982) 4 Cr App R (S) 153
- R v Knight, 6 Cr App R (S) 31,  Crim LR 304, CA
- R v Healey (1990) 12 Cr App R (S) 297
- R v Dunlop  2 Cr App R (S) 27
- R v Archer  EWCA Crim 1996,  1 Cr App R (S) 86
- R v Adams  2 Cr App R (S) 15
- R v Cunningham  2 Cr App R (S) 61
See also the Crown Prosecution Service sentencing manual.
In Anglo-Saxon legal procedure, the offence of perjury could only be committed by both jurors and by compurgators. With time witnesses began to appear in court they were not so treated despite the fact that their functions were akin to that of modern witnesses. This was due to the fact that their role were not yet differentiated from those of the juror – hence false evidence or perjury by witnesses was not made a crime. Even in the fourteenth century when witnesses started appearing before the jury to testify, perjury by them was not made a punishable offence. The maxim then was that every witness’s evidence on oath was true. Perjury by witnesses began to be punished before the end of fifteenth century by the Star Chamber. The immunity enjoyed by witnesses began also to be whittled down or interfered with by the parliament in England in 1540 with subornation of perjury and, in 1562, with perjury proper. The punishment for the offence then was in the nature of monetary penalty, recoverable in a civil action and, not by penal sanction. In 1613, the Star Chamber declared perjury by a witness to be a punishable offence at common law.
For if it be not material, then though it be false, yet it is no perjury, because it concerneth not the point in suit, and therefore in effect it is extra-judicial. Also this act giveth remedy to the party grieved, and if the deposition be not material, he cannot be grieved thereby.
Perjury is a statutory offence in Northern Ireland. It is created by article 3(1) of the Perjury (Northern Ireland) Order 1979 (S.I. 1979/1714 (N.I. 19)). This replaces the Perjury Act (Northern Ireland) 1946 (c. 13) (N.I.).
Perjury operates in American law as an inherited principle of the common law of England, which defined the act as the "willful and corrupt giving, upon a lawful oath, or in any form allowed by law to be substituted for an oath, in a judicial proceeding or course of justice, of a false testimony material to the issue or matter of inquiry." William Blackstone touched on the subject in his Commentaries on the Laws of England, establishing perjury as "a crime committed when a lawful oath is administered, in some judicial proceeding, to a person who swears willfully, absolutely, and falsely, in a matter material to the issue or point in question." The punishment for perjury under the common law has varied from death to banishment and has included such grotesque penalties as severing the tongue of the perjurer. The definitional structure of perjury provides an important framework for legal proceedings, as the component parts of this definition have permeated jurisdictional lines, finding a home in American legal constructs. As such, the main tenets of perjury, including mens rea, a lawful oath, occurring during a judicial proceeding, a false testimony have remained necessary pieces of perjury’s definition in the United States.
Perjury’s current position in the American legal system takes the form of state and federal statutes. Most notably, the United States Code prohibits perjury, which is defined in two senses for federal purposes as someone who:
(1) Having taken an oath before a competent tribunal, officer, or person, in any case in which a law of the United States authorizes an oath to be administered, that he will testify, declare, depose, or certify truly, or that any written testimony, declaration, deposition, or certificate by him subscribed, is true, willfully and contrary to such oath states or subscribes any material matter which he does not believe to be true; or
(2) in any declaration, certificate, verification, or statement under penalty of perjury as permitted under section 1746 of title 28, United States Code, willfully subscribes as true any material matter which he does not believe to be true
The above statute provides for a fine and/or up to five years in prison as punishment. Within federal jurisdiction, statements made in two broad categories of judicial proceedings may qualify as perjurious: 1) Federal official proceedings, and 2) Federal Court or Grand Jury proceedings. A third type of perjury entails the procurement of perjurious statements from another person. More generally, the statement must occur in the "course of justice," but this definition leaves room open for interpretation. One particularly precarious aspect of this phrasing is that it entails knowledge of the accused person’s perception of the truthful nature of events and not necessarily the actual truth of those events. It is important to note the distinction here, between giving a false statement under oath and merely misstating a fact accidentally, though this distinction can be especially difficult to discern in court of law.
The development of perjury law in the United States centers on United States v. Dunnigan, a seminal case that set out the parameters of perjury within United States law. The court uses the Dunnigan-based legal standard to determine if an accused person, "[T]estifying under oath or affirmation violates this section if she gives false testimony concerning a material matter with the willful intent to provide false testimony, rather than as a result of confusion, mistake, or faulty memory." However, a defendant shown to be willfully ignorant may in fact be eligible for perjury prosecution. The Dunnigan distinction manifests its importance with regard to the relation between two component parts of perjury’s definition: in willfully giving a false statement, a person must understand that she is giving a false statement to be considered a perjurer under the Dunnigan framework. Deliberation on the part of the defendant is required for a statement to constitute perjury. Jurisprudential developments in the American law of perjury have revolved around the facilitation of "perjury prosecutions and thereby enhance the reliability of testimony before federal courts and grand juries." With this goal in mind, Congress has sometimes expanded the grounds on which an individual may be prosecuted for perjury, with section 1623 of the United States Code recognizing the utterance of two mutually incompatible statements as grounds for perjury indictment even if neither can unequivocally be proven false. However, the two statements must be so mutually incompatible that at least one must necessarily be false; it is irrelevant whether the false statement can be specifically identified from among the two. It thus falls on the government to show that a defendant (a) knowingly made a (b) false (c) material statement (d) under oath (e) in a legal proceeding. These proceedings can be ancillary to normal court proceedings, and thus, even such menial interactions as bail hearings can qualify as protected proceedings under this statute.
Wilfulness is an element of the offense. The mere existence of two mutually exclusive factual statements is not sufficient to prove perjury; the prosecutor nonetheless has the duty to plead and prove statement was willfully made. Mere contradiction will not sustain the charge; there must be strong corroborative evidence of the contradiction.
One significant legal distinction lies in the specific realm of knowledge necessarily possessed by a defendant for her statements to be properly called perjury. Though the defendant must knowingly render a false statement in a legal proceeding or under federal jurisdiction, the defendant need not know that they are speaking under such conditions for the statement to constitute perjury. All tenets of perjury qualification persist–the “knowingly” aspect of telling the false statement simply does not apply to the defendant’s knowledge about the person she intends to deceive.
Perjury law’s evolution in the United States has experienced the most debate with regards to the materiality requirement. Fundamentally, statements that are literally true cannot provide the basis for a perjury charge (as they do not meet the falsehood requirement) just as answers to truly ambiguous statements cannot constitute perjury. However, such fundamental truths of perjury law become muddled when discerning the materiality of a given statement and the way in which it was material to the given case. In United States v. Brown, the court defined material statements as those with "a natural tendency to influence, or is capable of influencing, the decision of the decision-making body to be addressed," such as a jury or grand jury. While courts have specifically made clear certain instances which have succeeded or failed to meet the nebulous threshold for materiality, the topic remains unresolved in large part, except in certain legal areas where intent manifests itself in an abundantly clear fashion, such as with the so-called perjury trap, a specific situation in which a prosecutor calls a person to testify before a grand jury with the intent of drawing a perjurious statement from the person being questioned.
Defense of recantationEdit
Despite a tendency of American perjury law toward broad prosecutory power under perjury statutes, American perjury law has afforded potential defendants a new form of defense not found in the British Common Law. This defense requires that an individual admit to making a perjurious statement during that same proceeding and recanting the statement. Though this defensive loophole slightly narrows the types of cases which may be prosecuted for perjury, the effect of this statutory defense is to promote a truthful retelling of facts by witnesses, thus helping to ensure the reliability of American court proceedings just as broadened perjury statutes aimed to do.
Subornation of perjuryEdit
Subornation of perjury stands as a subset of American perjury laws and prohibits an individual from inducing another to commit perjury. Subornation of perjury entails equivalent possible punishments as perjury on the federal level. This crime requires an extra level of satisfactory proof, as prosecutors must show not only that perjury occurred, but also that the defendant positively induced said perjury. Furthermore, the inducing defendant must know that the suborned statement is a false, perjurious statement.
Notable convicted perjurersEdit
- Jonathan Aitken, British politician, was sentenced to 18 months imprisonment in 1999 for perjury.
- Jeffrey Archer, British novelist and politician, was sentenced to 4 years imprisonment for perjury in 2001.
- Kwame Kilpatrick, Detroit mayor was convicted of perjury in 2008.
- Marion Jones, American track and field athlete, was sentenced to 6 months imprisonment after being found guilty of two counts of perjury in 2008.
- Mark Fuhrman, Los Angeles Police Department detective, entered a no contest plea to a perjury charge relating to his testimony in the murder trial of O. J. Simpson. This was one of the seminal occurrences of Testilying by a police officer.
- Alger Hiss, American government official who was accused of being a Soviet spy in 1948 and convicted of perjury in connection with this charge in 1950.
- Lil' Kim, American rapper was convicted of perjury in 2005 after lying to a grand jury in 2003 about a February 2001 shooting. She was sentenced to one year and one day of imprisonment.
- Lewis "Scooter" Libby, was convicted in 2007 of two counts of perjury in connection with the Plame affair.
- Bernie Madoff, the former Chairman of the NASDAQ stock exchange, in 2009 he was found guilty of perjury in relation to investment fraud arising from his operating a Ponzi scheme.
- Michele Sindona, convicted of perjury related to a bogus kidnapping in August 1979.
- Tommy Sheridan, Scottish politician, found guilty of lying on affirmation in a trial in 2010.
- John Waller, British highwayman, known for his death while being pilloried for perjury in 1732
Allegations of perjuryEdit
Notable people who have been accused of perjury include:
- Barry Bonds was indicted by a federal grand jury for allegedly perjuring himself in testimony denying the use of performance-enhancing drugs. The perjury charges were later dropped after a deadlock by the trial jury.
- Former U.S. President Bill Clinton was accused of perjury and as a result was impeached by the House of Representatives on 19 December 1998. No criminal charges were ever brought and upon leaving office he accepted immunity.
- Andy Coulson, British journalist and political aide, was cleared of perjury charges in the News International phone hacking scandal, because his questioned testimony was ruled immaterial.
- James R. Clapper, former Director of National Intelligence, was accused of perjury for telling a congressional committee in March 2013, that the National Security Agency does not collect any type of data at all on millions of Americans.
- "Perjury - What is it?". Law Advice: White Collar Crimes. FreeAdvice. December 2008. Retrieved 3 February 2014.
- See: 18 U.S.C. § 1621; 28 U.S.C. § 1746.
- "Perjury". Criminal Law Lawyer Source. Retrieved 8 April 2010.
- Criminal Code, RSC 1985, c C-46, s 131, as amended by RSC 1985, c 27 (1st Supp.), s 17, and SC 1999, c 18, s. 92.
- Criminal Code, s 132, as amended by RSC 1985, c 27 (1st Supp), s 17 and SC 1998, c 35, s 119.
- The Court of Justice of the European Communities (Perjury) Act 1975, section 1
- The Court of Justice of the European Communities (Perjury) Act 1975, section 2
- "Perjury Act 1911". legislation.gov.uk. Retrieved 24 July 2015.
- The European Communities Act 1972, section 11(1)(a)
- The Evidence (European Court) Order 1976 (S.I. 1976/428), article 3, as read with article 2
- The Patents Act 1977, section 92(5)
- The Criminal Justice Act 1988, section 32(3)
- The Youth Justice and Criminal Evidence Act 1999, section 29(7)
- The Youth Justice and Criminal Evidence Act 1999, section 31(6)
- Archbold Criminal Pleading, Evidence and Practice. 1999. Paragraph 28-159 at page 2303.
- Ormerod, David. Smith and Hogan's Criminal Law. Thirteenth Edition. Oxford University Press. 2011. Section 4.1.4 at page 49.
- Smith, J C and Hogan, Brian. Criminal Law. Second Edition. Sweet & Maxwell. 1965. p. 509 footnote 12.
- Ormerod, David. Smith and Hogan's Criminal Law. Thirteenth Edition. Oxford University Press. 2011. Section 18.104.22.168 at page 50.
- The Perjury Act 1911, section 1(1); the Magistrates' Courts Act 1980, section 17(1) and Schedule 1, paragraph 14(a)
- The Perjury Act 1911, section 1(1); the Criminal Justice Act 1948, sections 1(1) and (2)
- "Perjury". cps.gov.uk. Retrieved 24 July 2015.
- Turner, J.W.C: Kenny Outlines on Criminal Law (Cambridge at University, Press: London, 1964) (18th edition), p.421.
- Archbold Criminal Pleading, Evidence and Practice. 1999. Paragraph 28-160 at page 2303. They cite 3 Inst 167.
- Smith, J.C, and Hogan, Brian. Criminal Law. Sweet & Maxwell. 1965. Second Edition. Page 506.
- 3 Inst 167. This passage is quoted by Smith, J.C, and Hogan, Brian, Criminal Law (Sweet & Maxwell, 1965) (2nd Edition), p. 506.
- "To reform the NSA, fire officials who lie". The Guardian. 25 September 2013.
- Clark, William (1894). Hand-Book of Criminal Law. West Publishing Company.
- Blackstone, William (1765). Commentaries on the Law of England.
- Doyle, Charles (2010). "Perjury Under Federal Law: A Brief Overview". Congressional Research Service.
- Livingston, Edward (1828). A System of Penal Law for the United States of America.
- United States Code, Title 18, Part 1, Section 1621.
- cLARK, William (1894). Hand-Book of Criminal Law. West Publishing Co.
- Shuy, Roger (2011). he Language of Perjury Cases. Oxford University Press.
- United States v. Dunnigan 507 U.S. 87 (1993).
- United States v. Fawley (1998).
- Dunn v. United States 480 U.S. 294 (1987).
- United States Code, Title 18, Part 1, Section 1623 (c).
- United States v. McAfee 971 F.2d 755 (1992).
- United States v. Gorman.
- United States v. Greene 355 U.S. 184 (1957).
- People v Cash, 388 Michigan Reports 153 (1972). See People v McIntire, 232 Mich App 71 (1998), rev’d on other grounds 461 Mich 147 (1999).
- United States v. Yermian 468 U.S. 63 (1984).
- Bronston v. United States, 409 U.S. 352 (1973).
- United States v. Richardson, 418 U.S. 166 (1974).
- United States v. Brown, 381 U.S. 437 (1965).
- Gershman, Bennett (1981). "The "Perjury Trap"". Pace Law Faculty Publications.
- United States Code, Title 18, Part 1, Section 1623 (d).
- United States Code, Title 18, Part 1, Section 1622.
- Rosen v. N.L.R.B. 735 F.2d 564 (1984).
- "UK Politics: Aitken's downfall complete". BBC News Online. BBC. 8 June 1999. Retrieved 17 March 2010.
- "Archer jailed for perjury". BBC News Online. BBC. 19 July 2001. Retrieved 17 March 2010.
- Chris Lawrence (24 March 2008). "Detroit mayor faces felony charges". CNN. Retrieved 17 March 2010.
- "Mayor: 'I lied under oath'". Retrieved 2008-09-04.
- Lynn Zinser (12 January 2008). "Judge Sentences Jones to 6 Months in Prison". New York Times. Retrieved 17 March 2010.
- "Mark Fuhrman's perjury probation ends". CNN.
- Slobogin, Christopher (Fall 1996). "Reform The Police: TESTILYING: POLICE PERJURY AND WHAT TO DO ABOUT IT". University of Colorado Law Review. Boulder, Colorado: University of Colorado Law School. 67: 1037. Retrieved December 28, 2012.
- "Lil' Kim Sentenced To Jail". NME. 8 July 2005. Retrieved 17 March 2010.
- Dowd, Maureen. "Lewis "Scooter" Libby conviction". New York Times. New York Times. Retrieved 21 March 2010.
- Brockman, Joshua (17 December 2008). "Q&A: Madoff Case Puts Spotlight On SEC". National Public Radio. Retrieved 26 May 2009.
- "Nation: Account Settled". Time. Time. 7 April 1980. Retrieved 21 March 2010.
- "Tommy Sheridan found guilty of perjury". BBC. 23 December 2010. Retrieved 23 December 2010.
- "Barry Bonds indicted on perjury, obstruction charges". ESPN. 19 November 2007. Retrieved 20 March 2010.
- Mintz, Howard (18 September 2014). "Barry Bonds case: Court to rehear home-run king's appeal". San Jose Mercury News. Retrieved 1 October 2015.
- Alison Mitchell (20 December 1998). "Impeachment: the overview -- Clinton impeached; he faces a senate trial, 2d in history; vows to do job till term's 'last hour'". New York Times. Retrieved 10 April 2010.
- Neil A Lewis (20 January 2000). "Exiting Job, Clinton Accepts Immunity Deal". New York Times. Retrieved 17 March 2010.
- "Andy Coulson cleared of perjury as trial collapses". BBC News. 3 June 2015. Retrieved 1 October 2015.
- "Has James Clapper been indicted for perjury yet?". Retrieved 18 July 2017.
- "Lawmakers to Obama: Fire your intelligence chief for lying". MSNBC. February 27, 2014.
- "Lock Him Up? Lawmakers Renew Calls for James Clapper Perjury Charges". U.S. News. November 17, 2016.
- Trujillo, Mario (19 December 2013). "Paul: Clapper should resign for 'lying to Congress'". TheHill. Retrieved 18 July 2017.
- "Rand Paul: Clapper lied to Congress". Washington Post. Retrieved 18 July 2017.
- "Did Intel Director James Clapper Lie to Congress? It's Complicated". ABC News. 13 June 2013. Retrieved 18 July 2017.
- Sottek, T. C. (19 December 2013). "Lawmakers slam intelligence chief James Clapper for lying to Congress, call for DOJ investigation". The Verge. Retrieved 18 July 2017.
- "Lock Him Up? Lawmakers Renew Calls for James Clapper Perjury Charges". Retrieved 18 July 2017.
- "James Clapper says he misspoke, didn't lie about NSA surveillance". Retrieved 18 July 2017.
- Hattem, Julian (8 May 2015). "Attorney: Spy chief had 'forgotten' about NSA program when he misled Congress". TheHill. Retrieved 18 July 2017.
- McCarthy, Kieren. "James Clapper has found another reason why he lied about NSA spying". Retrieved 18 July 2017.
- "Director of National Intelligence James Clapper has resigned". NBC News. Retrieved 18 July 2017.
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- Bryan Druzin, and Jessica Li, The Criminalization of Lying: Under what Circumstances, if any, should Lies be made Criminal?, 101 JOURNAL OF CRIMINAL LAW AND CRIMINOLOGY (Northwestern University) (forthcoming 2011).
- Gabriel J. Chin and Scott Wells, The "Blue Wall of Silence" as Evidence of Bias and Motive to Lie: A New Approach to Police Perjury, 59 University of Pittsburgh Law Review 233 (1998).
- Perjury Under Federal Law: A Brief Overview Congressional Research Service