The primary Ethics Alarms topic scout, the Amazing Fred, has posed a question about this case, in which a child pornography conviction was overturned because the government prosecutor repeatedly stated that his witnesses were stating the truth, and that the government doesn’t prosecute defendants who aren’t guilty.
Fred asks the question this way:
“A prosecutor told a jury that prosecution witnesses were credible…Isn’t a defense attorney allowed to discredit prosecution witnesses? Why shouldn’t a prosecutor be free to argue the opposite?
The problem isn’t arguing that prosecution witnesses are credible, but rather the prosecutor appearing to personally vouch for the witness. Lawyers aren’t witnesses, and their opinions aren’t testimony or evidence. A lawyer can tell a jury that a defendant is guilty or innocent, but a lawyer cannot say “I believe “ a witness or “I believe” the defendant is guilty. It doesn’t matter what the lawyers believe, and they prejudice the jury by making their own credibility part of the case. Lawyers don’t have to personally believe in the positions they argue. Continue reading