Juries often find the defendant "not guilty" (an increase from 32 to 43% in the 1990s) Modern cases often involve a mass of technical information that an ordinary person cannot be expected to understand Juries are often unrepresentative It is the duty of every citizen to be available for jury service, but few people want to do it: spending weeks or longer in a court room listening to boring evidene instead of getting on with your normal life, you get paid on expenses, you do not earn a fee.