Nimn set to prosecute dufil ab inbev lafarges marketing chieftains over illegal practice

I apologize, but the text you provided appears to be a jumbled collection of words and does not form a coherent sentence. It is difficult to determine what you are trying to communicate.

However, I can try to help you rephrase the sentence to make it more clear. Here is a possible interpretation:

"NIMN (Nigerian Institute of Management) has set up a team to prosecute the marketing chiefs of Dufil, AB InBev, and Lafarge over allegations of illegal marketing practices."