obstruction of justice
the crime or act of willfully interfering with the process of justice and law esp. by influencing, threatening, harming, or impeding a witness, potential witness, juror, or judicial or legal officer or by furnishing false information in or otherwise impeding an investigation or legal process <the defendant's obstruction of justice led to a more severe sentence>
TITLE 18 > PART I > CHAPTER 73 > § 1513
§ 1513. Retaliating against a witness, victim, or an informant
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(b) Whoever knowingly engages in any conduct and thereby causes bodily injury to another person or damages the tangible property of another person, or threatens to do so, with intent to retaliate against any person for—
(1) the attendance of a witness or party at an official proceeding, or any testimony given or any record, document, or other object produced by a witness in an official proceeding;
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or attempts to do so, shall be fined under this title or imprisoned not more than ten years, or both.
TITLE 18 > PART II > CHAPTER 227 > SUBCHAPTER A > § 3553
§ 3553. Imposition of a sentence
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(a) Factors To Be Considered in Imposing a Sentence.— The court shall impose a sentence sufficient, but not greater than necessary, to comply with the purposes set forth in paragraph (2) of this subsection. The court, in determining the particular sentence to be imposed, shall consider—
(1) the nature and circumstances of the offense and the history and characteristics of the defendant;
(2) the need for the sentence imposed—
(A) to reflect the seriousness of the offense, to promote respect for the law, and to provide just punishment for the offense;
(B) to afford adequate deterrence to criminal conduct;
(C) to protect the public from further crimes of the defendant; and
(D) to provide the defendant with needed educational or vocational training, medical care, or other correctional treatment in the most effective manner;
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(b) Application of Guidelines in Imposing a Sentence.—
(1) In general
Except as provided in paragraph (2), the court shall impose a sentence of the kind, and within the range, referred to in subsection (a)(4) unless the court finds that there exists an aggravating or mitigating circumstance of a kind, or to a degree, not adequately taken into consideration by the Sentencing Commission in formulating the guidelines that should result in a sentence different from that described.