How does a prosecutor determine intent?
<p>When prosecutors look at a statute, how do they determine the requirements to prove intent?</p>

<p>For example, look at this statute:</p>

<blockquote>
  <p>“Whoever knowingly and with intent to defraud, accesses a protected computer without authorization, or exceeds authorized access, and by means of such conduct furthers the intended fraud and obtains anything of value, unless the object of the fraud and the thing obtained consists only of the use of the computer and the value of such use is not more than $5,000 in any 1-year period;” (U.S. Code Sec. 1030, par. 4)</p>
</blockquote>

<p>How does one determine what is necessary to prove a defendant acted “knowingly and with intent to defraud”? For example, do they need to prove the defendant knew he didn’t have authorization? What about intent to defraud &mdash; do they need to prove he knew it was against the law, too?</p>

<p>(tl;dr) My specific question: <strong>How do prosecutors determine the elements necessary to satisfy the <em>mens rea</em> requirements attached to certain laws?</strong></p>

<p>This is actually a very complicated question, about (1) the scope of "knowingly", (2) what kind of "intent" is required for conviction, (3) how does the jury understand and evaluate concepts of intent and (4) how does an attorney persuade the jury that the situation does or does not satisfy the particular intent requirement. One thing we can dispose of quickly is the possibility that the law says that the accused has to actually <em>know</em> that the act is against the law. It is a standard legal fiction (2,400 years old) that the accused knows the law, or should have known.</p>

<p>As for the 4th element, persuasion, on the strong side we have statements of intent by the accused – "And I pulled out my rifle and blew his head off, and I laughed the whole time". What the jury has to decide is whether the accused had in mind a conscious purpose of doing some act (that is, it wasn't just an accident like butt-dialing, or an instant stimulus-response reaction to some event). "Intent" generally falls in the realm of acting "purposely", which the Model Penal Code §2.02 defines as:</p>

<blockquote>
  <p>A person acts purposely with respect to a material element of an
  offense when:</p>
  
  <p>(i) if the element involves the nature of his conduct or a result
  thereof, it is his conscious object to engage in conduct of that
  nature or to cause such a result; and </p>
  
  <p>(ii) if the element involves the attendant circumstances, he is aware
  of the  existence of such circumstances or he believes or hopes that
  they exist.</p>
</blockquote>

<p>which more or less means what you think "with intent" means. That doesn't say what they intended to do, it just distinguishes intent from negligence and accident. The prosecutor would then present factual evidence that the accused had a bad intent, like showing that he actually made an attempt to access credit card account data (that such data had been accessed when he broke into the system), etc.</p>

<p>We can sort of dispose of the other scope question about "knowingly", namely, what things would he have to know? The chunk <em>accessing a protected computer without authorization</em> can be interpreted in a number of ways, having to do with which elements of the clause are known to the accused. You might know that you were accessing but not know that you were unauthorized; you might know that you were accessing and unauthorized, but not know that the computer is protected. The only reliable way to know which is which is to study the case law on a statute and see if there is a controlling decision that say e.g. that you have to know that you are accessing and are unauthorized, but you don't have to know that the computer is protected. I haven't determined (yet) is there is decisive case law on this, but I'm betting that the outcome would be that not knowing of the protected status of a computer carries no weight.</p>

<p>As for what kind of intent, there is a distinction between "specific intent" and "general intent". The distinction comes down to having some evil purpose like "make him suffer" (general intent) versus a specific evil purpose like "kill him".</p>

<p>Finally, the people who actually decide, the jury, will be given instructions that say what they have to look for. Here is the tip of the tip of the iceberg, from California's criminal jury instructions. The judge will say...</p>

<blockquote>
  <p>The People must prove not only that the defendant did the acts
  charged, but also that (he/she) acted with a particular (intent/
  [and/or] mental state). The instruction for (the/each) crime [and
  allegation] explains the (intent/ [and/or] mental state) required.
  A[n] (intent/ [and/or] mental state) may be proved by circumstantial
  evidence.</p>
  
  <p>Before you may rely on circumstantial evidence to conclude that a fact
  necessary to find the defendant guilty has been proved, you must be
  convinced that the People have proved each fact essential to that
  conclusion beyond a reasonable doubt.</p>
  
  <p>Also, before you may rely on circumstantial evidence to conclude that
  the defendant had the required (intent/ [and/or] mental state), you
  must be convinced that the only reasonable conclusion supported by the
  circumstantial evidence is that the defendant had the required
  (intent/ [and/or] mental state). If you can draw two or more
  reasonable conclusions from the circumstantial evidence, and one of
  those reasonable conclusions supports a finding that the defendant did
  have the required (intent/ [and/or] mental state) and another
  reasonable conclusion supports a finding that the defendant did not,
  you must conclude that the required (intent/ [and/or] mental state)
  was not proved by the circumstantial evidence. However, when
  considering circumstantial evidence, you must accept only reasonable
  conclusions and reject any that are unreasonable.</p>
</blockquote>

<p>and then there will be some specific elaboration of whether they have to find that the accused just generally intended to do bad, versus intended to specifically defraud.</p>

trial definition legal-concepts statutes mens-rea