The largest DNA database in the world is the National DNA Index System (NDIS), created by the FBI (USA) in 1994 and which, as of April 2016, contained 12.2 million offender profiles (genetic profiles of known criminals), 2.6 million arrestee profiles (from individuals detained but not convicted) and 684,000 forensic profiles (pieces of crime scene evidence).NDIS is the database that sits within the FBI’s Combined DNA Index System (CODIS), which stores and administers all of the bureau’s criminal genetic information. It consists of nearly 200 laboratories, spread across the USA. Since its inception, investigators using CODIS and NDIS have logged an impressive 300,050 genetic matches, and the system is believed to have assisted in 285,447 cases.