It is likely that a serious felony has been committed right under District Attorney Alvin Bragg's nose and he is not investigating it. Under New York law, it is a felony to leak confidential grand jury information, such as whether the jurors voted to indict. The protection of secrecy is as applicable to President Trump as it is to anyone else. 

We know that the information was disclosed while the indictment itself remains sealed and before any official announcement was made or charges brought. It is unlikely that the leak came from the Trump team, which seemed genuinely surprised.

The most likely, though uncertain, scenario is that a person in Mr. Bragg's office or a grand juror unlawfully leaked the sealed information. That would be a class E felony, subject to imprisonment.

It is possible of course that an investigation is underway, but it seems more likely that Mr. Bragg is too busy making up a crime against the man he promised in his campaign to get than investigating a real crime that took place on his watch.