CODIS IS THE COMBINED DNA INDEX SYSTEM

All those convicted of a violent crime must submit a sample of DNA to be entered into this system When evidence is collected at a crime scene, and there is no known suspect, the biological evidence is entered into CODIS to see if there is a match. Multiple murders and rapes are linked this way, and can lead to a suspect whose identity has been entered into a different system like AFIS, the Automated Fingerprint Identification System.