If you are talking about the one where an FBI sharpshooter shot and killed Vicky Weaver while she was holding her child, yes he got involved in that.
Yes, he was a hero in Vietnam. That doesn't make him a lifelong saint.
Trust me, he's one guy you do NOT want in this, or those he'll attract with him.
Yes, that was Lon Hourichi. He was at Waco, too.