In any event, whether the trial is covered on tv, whether the testimony is given in a "public" courtroom, there was an order prohibiting that information from being given to the witnesses. Those were the rules and everybody knew them. Further, I doubt the complete government opening statement was played on any news show so the witnesses likely didn't see it.
Wait until you are in court for whatever reason, prosecution, defense, plaintiff, defendant - and somebody tells you it doesn't matter when they break the rules.
We have this rule of law for a reason, and the government decided to try this guy in this forum. If the rules get broken regarding a death penalty case, you are going to catch some hell. I didn't say what the judge should do, I still think in this case the jury should decide. But the rules are there for a reason.
I didn't say it didn't matter that they broke the rules, I said that this rule violation hardly seems to compromise the integrity of the trial.
As to coaching, ethical or not, there isn't an atty alive who puts a witness on the stand cold. The ATTY himself may not tell the witness directly, use this word or that word... but they certainly will find a surrogate to do it for them if they feel the need.