Why doesn't the news hide your identity until after your proven guilty of a crime?

When someone is accused of a crime, the news shows their face and their ID, before they're actually convicted of anything. This causes some problems, because people watching will automatically assume guilt before conviction. And when the person is acquitted or proven not guilty, they receive harassment and/or get treated differently afterwards. This happened to my cousin when he was accused of abusing his girlfriend. The charges were dropped after it was proved that his girlfriend hit him with a chair and was just restraining her down. Unfortunately, this happens to people. What can be done?