There's a reason that Putin throws people out of windows. He wants everyone to know that he killed those people, and he wants everyone to know that nobody is going to stop him.
Trump and his fascist army wants you to know that they will murder witnesses, and nobody will stop them.
Even if it was just a horrible coincidence, Trump is going to act like they killed him because he likes taking credit for things.
The point is that the ones who don't know should know. That's like the entire point of news. If the article keeps it vague, then people who are barely paying attention might think that an actual judge made a legal ruling based on the law. They might assume that a federal judge is non-partisan and independent.