Britain has built the world's biggest DNA database without proper political debate and police routinely arrest people just to get their DNA profiles onto the system, the genetics watchdog said in a report on Tuesday. The Human Genetics Commission, which advises the government on the social, legal and ethical aspects of genetics, called for a review of the database and said new laws must be passed to govern its use. In a damning report, the commission said "function creep" had transformed the system from a DNA store for offenders into a database of suspects. More than three-quarters of young black...