Ummm, yes!!

You should ABSOUTELY bring that slime ball divorce lawyer's actions to the attention of his employers if nothing else. He has just proven that he is willing manufacture evidence to falsely influence a verdict/settlement, and is even willing to arrange the condemnation of the innocent in the process. It is wholly reprehensible of you as a peer of the same profession to knowingly let him continue to practice in your profession. Potentially, you could even be directly responsible for the fall of that entire lawfirm when he finally slips up, gets caught and the entire law firm's reputation burns with him instead of giving them a chance to deal with him, or - better yet - actually getting him disbarred.