The recording and storage of information related to a case have changed by using databases to help compare bullets, drugs, and trademarks found at a crime scene or during an investigation.
Undoubtedly, the aspect of forensic science that has had the greatest impact on society is that of DNA fingerprinting. ... The advances in DNA profiling have also led to the exonerations of many former criminals. Old cases have been re-opened, and with DNA testing, many supposed culprits have been proven innocent.
Like the Metropolitan police American police where organized in a quasi-milatary command structure. There main task was the prevention of crime and disorder, and they provide a wide array of other public services.
Explanation:The short version of the rule is that you cannot be prosecuted more than once for the same crime. It prevents prosecution for the same crime after an acquittal or a conviction, and it also prevents imposing multiple punishments for the same crime.
