Cameras should not be placed in courtrooms. A criminal trial is a very private matter for the family of the victim and the defendant, and it should be treated as such. When the dirty laundry of a criminal trial is televised, that ruins the whole point of the trial and often makes it more difficult.
Unfortunately, the media sensationalizes court cases and hearings every day. Not all of these trials see the light of day with video cameras, though. State and federal laws sometimes ban cameras from the courtroom, and that's how things should be today. Most cases shouldn't be televised because glamorizing courtrooms turn them into something like a game show.