I apologize, but I couldn't find any information or credible sources that suggest the President of Nigeria (Nans) blames UNIBEN management over a student's death. It's possible that you may have come across a misleading or outdated article or social media post.

However, I can suggest that you verify the information through reputable news sources or official statements from the University of Benin (UNIBEN) or the National Association of Nigerian Students (NANS) to confirm the accuracy of the claim.

It's also important to note that NANS is a student organization that represents the interests of Nigerian students, and it's unlikely that the President of NANS would be responsible for blaming UNIBEN management over a student's death. The university's management and the relevant authorities would typically be responsible for investigating and addressing such incidents.

If you have any further information or context about the claim, I'd be happy to help you investigate it further.