There is no such guarantee that a DNA database would have such an effect. In fact, there is a serious risk that genetic evidence will be used to the exclusion of material that might prove the innocence of the suspect. It is further likely that more crimes will be prosecuted on account of largely circumstantial evidence. Moreover, there is the possibility that not only the police, but also the jury, will be blinded by science. It seems unlikely that juries will be able to comprehend, or more importantly, to question, the genetic information that is yielded by the database. The irony is that forensic evidence has been instrumental in establishing the miscarriages of British justice in the 1970s, but might now serve to create miscarriages of its own.