The media wields tremendous influence in our society. Newspapers, radio, television, and new media not only spread information, but also help to determine what topics and stories people talk about. Many crimes receive extensive media coverage, which provides a challenge for prosecutors, as well as defendants and defense attorneys, when it comes to trying a case. Juries are supposed to be unbiased when deciding a case, despite the news coverage they may have come across before trial. Police officers involved in criminal cases may become entangled with the media in the process of providing information about a case. Media coverage of a trial, especially television cameras in the courtroom, can affect the behavior of witnesses and jurors.