This decision doesn't say that you can't 'blow the whistle' on your employer--it just says that you can be 'disciplined' by your employer if you do.  The Supreme Court isn't saying that Caballos' actions are criminal is it?  They are just saying that his speech isn't protected against professional repercussions.  Do I think that Caballos did exactly what he was supposed to do?  Hell Yes!  Do I think that he has the right to speak to the bar association about what he did and what happened to him as a consequence?  Absolutely! Could his employers fire him or demote him for doing it?  Unfortunately, yes.

Freedoms take sacrifice.  In this case, the sacrifice was professional.  It could have been worse.  And my question is, What happened to the cop who purjered himself, and to the supervising D.A. who tried to cover up the illegal action?

This kind of professional revenge against whisleblowers is not ethical and it's down-right disgusting, but unfortunately, it is legal.  So, until laws are enacted to stop it, it will continue.

The issue is, indeed, that Mr. Caballos was asked to perform a criminal act as a condition of his employment.  So, Mr. Caballos, if you're reading this, I recommend a new lawsuit.