It is permissible to bring the exam results to a law student because studying law is not necessarily going to lead to him working in a haraam field. It may be studied by one who wants to know man-made laws and compare them with sharee’ah laws, or to work as a lawyer within the guidelines of sharee’ah and win people their rights and support those who have been wronged.
Based on that, there is nothing wrong with helping this student by bringing the results to him, so long as it is not apparent that he wants to study for a haraam purpose.
See also the answer to question no. 9496.