It was 98 I think.
Levrone and Ray were pissed off (I think Milos may have been there too, but not sure) that Chad was allowed to be guru to his guys. This was during the whole Plasma Expander era, when guys were rumored to be doing all sorts of wild shit; withdrawing blood and putting extra GH into it and then freezing it cold then after a period of time they put the blood back in and have an extra fullness to them. Just crazy shit was being said during this time.
Anyway, Chad was along with his guys (Ronnie, Nasser and maybe another) and the issue of Plasma Expanders and other exotic shit came up. Ray and Levrone were trying to make a stand with the judges and say that guys like Chad shouldn't be allowed to advise competitors because the risk some of these guys are facing.
Chad didn't like this and wanted to confront Levrone and Kevin backed down once Chad found him after the athletes meeting. Chad and Ray never had a good relationship from what I remember. So I think Chad just ignored Shawn without hesitation.
Much like in 93 when Yates took things to a new level, Ronnie in 98 took things to another level as well and some speculate that Chad is one reason for this....and that Chad shouldn't have been allowed to advise like he still does.