Ahem...you and I know that but attorneys have a tendency to bend the rules to suit their needs particularly when there is something to be gained from it. It’s natural for them to do so. The reasons are many. Most come from stable wealthy families so there is quite often a lack of empathy for the “lesser” of the people. The often feel or give the impression that they are superior to other human beings. You can tell it in their verbiage, body language, and mannerisms. In addition they often interpret the laws often bending their meanings when the law is ambiguous particularly if it will bring their client out on top even if it’s no ethical. This doesn’t apply to all but to a large percentage if them. I’ve been around them all my life.
Besides, no lawyer likes to have an ethical charge against him--and risk public exposure---no matter how high up the legal chain he is.
Public exposure of lawyers repping illegals would inflame America's growing disgust w/ border violators.
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Another possibility is to tangle w/ his malpractice insurance carrier. That could bear fruit....but you have to know how to do it.