His lawyer doesn't seem like much of a hell raiser. He was not exactly a bundle of righteous energy. He's probably looking at no (or at best a nominal) fee, and zero glory in this case.
If his lawyer knew that they didn't have the goods on him he could make plenty of hay off of this. I think that he knows that his client may be involved and doesn't want to look like a fool if LE uncovers something that is damning.