FBI plans ‘Rapid DNA’ network for quick database checks on arrestees

Though DNA has revolutionized modern crime fighting, the clues it may hold are not revealed quickly. Samples of saliva, or skin, or semen are sent to a crime lab by car (or mail), and then chemists get to work. Detectives are accustomed to waiting days or weeks, or longer, for the results. Some labs are so backed up, they take only the most serious crimes. Some samples are never tested.