Would an international student A in the US helping another international student B in Europe cheating be punished by US university? I have a quick question about a hypothetical situation:
An international student A in the US helped another international student B in the Europe finish the entire several homework assignments and an entire final exam. And now, the A has every evidence and chat files, and he wants to report the non-compliance of code of integrity to the European university of student B.
Would student A be punished since he helped student B finish the homework and exam? In this case, student A did not violate any discipline of his university in the US and the laws of the United States. Would student A still be punished by his university or by the law of US?
You seem to assume that the academic honesty rules at a university will always stipulate that dishonesty only counts as being against the rules if it occurs at that university.  That is a dangerous supposition to make.  Many universities have academic misconduct policies that refer broadly to collusion, cheating, and other forms of misconduct, without stipulation that the misconduct must occur in relation to an assessment at that university.  In such cases, there would be a genuine argument over the proper scope of the policy, and whether it may apply to instances of misconduct in relation to assessments at another university.
Just to give you an example of this, here is the present Academic Misconduct Rule at my University.  Section 6 of the policy provides that &quot;It is academic misconduct if a student: (a) in relation to an assessment: (i) cheats; ... (iii) improperly colludes with another person; or (iv) acts, or assists another person to act, dishonestly or unfairly in or in connection with an examination...&quot;.  While the policy certainly only applies to students enrolled at my University, you can see that it does not specify that the assessment in question must be an assessment at the University.  Likewise, Section 2 of the policy, which sets its scope, provides that &quot;This instrument applies to all students of the University.&quot;  Again, observe that it does not specify that the instrument applies only with respect to acts undertaking in relation to assessments and other matters at the University.
If student A were a student at my University (subject to the linked rules), I think there is a reasonable chance that his actions here would be considered to be a breach of this policy.  The student would of course have an opportunity to argue over whether the policy applies to an assessment at another university, and they would probably argue that this should be implied, irrespective of the specified scope.  Perhaps they would convince the academic misconduct committee of this (such that their conduct is considered out-of-scope) or perhaps they would not.  I would think that most academic staff would be concerned about this behaviour, and would be reluctant to consider it out-of-scope.