Final answer:
The GP.R.S. identifies a body through DNA fingerprinting, where forensic scientists compare the unique DNA patterns of a body with potential suspects or victims.
Step-by-step explanation:
The GP.R.S. identifies a body through a process called DNA fingerprinting. By retrieving DNA samples from a body, forensic scientists can compare the unique DNA patterns with those of potential suspects or victims. This technique is used in criminal investigations and forensics to determine if DNA evidence collected at a crime scene matches a suspect's DNA.