Attendant circumstance

In law, attendant circumstances (sometimes external circumstances) are the facts surrounding an event.

In the criminal law in the United States, the definition of a given offense generally includes up to three kinds of "elements": the actus reus, or guilty conduct; the mens rea, or guilty mental state; and the attendant (sometimes "external") circumstances. The reason is given in Powell v. Texas, 392 U.S. 514, 533 (1968):

The burden of proof is on the prosecution to prove each "element of the offense" in order for a defendant to be found guilty. The Model Penal Code §1.13(9) offers the following definition of the phrase "elements of an offense":

In United States v. Apfelbaum, 445 U.S. 115, 131 (1980)[1], Justice Rehnquist states, in his opinion for the Court, the general rule that:

For these purposes, the term "actus reus" does not have a single definition, but it represents the general principle that before an individual may be convicted of an offense, it must be shown that there was an overt act in pursuance of any intention. Otherwise, a person might be held liable for his or her thoughts alone. Model Penal Code §2.01(1):

But there are exceptions. For example, according to United States v. Dozal, 173 F.3d 787, 797 (10th Cir. 1999) a conspiracy in violation of 21 U.S.C. §846 consists of four elements:

But, according to United States v. Johnson, 42 F.3d 1312, 1319 (10th Cir. 1994) (citing United States v. Shabani, 513 U.S. 10 (1994)) drug conspiracies under 21 U.S.C. §846 are unique because the prosecution need not prove an overt act. Instead, the government must "prove that the defendant knew at least the essential objectives of the conspiracy and knowingly and voluntarily became a part of it." Consequently, withdrawal before an overt act has been committed cannot relieve a defendant of criminal responsibility. The policies that justify drug enforcement laws require this exception so that anyone who deliberately acquires knowledge of drug-related activities and thereby represents a social danger, may be convicted.

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