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Title 18 — Crimes and Criminal Procedure

Part I · Chapter 1 — General Provisions

§ 2. Principals

Statutory text

(a)

Whoever commits an offense against the United States or aids, abets, counsels, commands, induces or procures its commission, is punishable as a principal.

(b)

Whoever willfully causes an act to be done which if directly performed by him or another would be an offense against the United States, is punishable as a principal.

Legislative history

Reconstructed from this section’s Code source credit and amendment notes, resolved against the local Statutes at Large. Editorial notes are evidence, not the law that made the change.

  1. Pub. L. 80–645 · 62 Stat. 683

    Enacted · 18 U.S.C. § 2

    June 25, 1948, ch. 645, 62 Stat. 684

    Source evidence

    Code source credit
    June 25, 1948, ch. 645, 62 Stat. 684

  2. Public Law not identified

    Inserted · 18 U.S.C. § 2(a)

    Subsec. (a). Act Oct. 31, 1951, inserted “punishable as”

    Unresolved: No Public Law or Statutes at Large citation in the Code source.

    Source evidence

    Code amendment note
    Subsec. (a). Act Oct. 31, 1951, inserted “punishable as”.

  3. Public Law not identified

    1. Inserted · 18 U.S.C. § 2(b)

      Subsec. (b). Act Oct. 31, 1951, inserted “willfully” before “causes”, and “or another” after “him”

    2. Substituted · 18 U.S.C. § 2(b)

      Subsec. (b). Act Oct. 31, 1951, substituted “is punishable as a principal” for “is also a principal and punishable as such”

    Unresolved: No Public Law or Statutes at Large citation in the Code source.

    Source evidence

    Code amendment note
    Subsec. (b). Act Oct. 31, 1951, inserted “willfully” before “causes”, and “or another” after “him”, and substituted “is punishable as a principal” for “is also a principal and punishable as such”.

0 of 4 references resolved to an enrolled provision · 1 partial · 3 unresolved

Notes

Historical and Revision Notes

Based on title 18, U.S.C., 1940 ed., § 550 (Mar. 4, 1909, ch. 321, § 332, 35 Stat. 1152).

Section 2(a) comprises section 550 of title 18, U.S.C., 1940 ed., without change except in minor matters of phraseology.

Section 2(b) is added to permit the deletion from many sections throughout the revision of such phrases as “causes or procures”.

The section as revised makes clear the legislative intent to punish as a principal not only one who directly commits an offense and one who “aids, abets, counsels, commands, induces or procures” another to commit an offense, but also anyone who causes the doing of an act which if done by him directly would render him guilty of an offense against the United States.

It removes all doubt that one who puts in motion or assists in the illegal enterprise but causes the commission of an indispensable element of the offense by an innocent agent or instrumentality, is guilty as a principal even though he intentionally refrained from the direct act constituting the completed offense.

This accords with the following decisions: Rothenburg v. United States, 1918, 38 S. Ct. 18, 245 U.S. 480, 62 L. Ed. 414, and United States v. Hodorowicz, C. C. A. Ill. 1939, 105 F. 2d 218, certiorari denied, 60 S. Ct. 108, 308 U.S. 584, 84 L. Ed. 489. United States v. Giles, 1937, 57 S. Ct. 340, 300 U.S. 41, 81 L. Ed. 493, rehearing denied, 57 S. Ct. 505, 300 U.S. 687, 81 L. Ed. 888.

Editorial Notes

Amendments

1951—Subsec. (a). Act , inserted “punishable as”.

Subsec. (b). Act , inserted “willfully” before “causes”, and “or another” after “him”, and substituted “is punishable as a principal” for “is also a principal and punishable as such”.

Credits

1948–1951 · 2 acts
  1. 1948June 25, 1948, ch. 645, 62 Stat. 684
  2. 1951Oct. 31, 1951, ch. 655, § 17b, 65 Stat. 717.
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(June 25, 1948, ch. 645, 62 Stat. 684; Oct. 31, 1951, ch. 655, § 17b, 65 Stat. 717.)

Parsed from the official OLRC USLM XML in data/usc_all/usc18.xml · release point 119-108 · OLRC build 2026-05-04

USLM identifier /us/usc/t18/s2