DNA was found in the 1980’s when DNA came out it was referred to as a genetic blueprint of life.They do this to identify when an attacker has left blood or body fluid at the crime scene. DNA fingerprinting soon became an identification of people involved in serious crimes like murder. At the scene most attackers or killers will leave some measure of bodily fluid at a crime scene it could’ve been saliva, blood, or semen; was accepted as common place and it became the main gear they used at the crime scene. DNA testing is presented in many steps; investigators collect their DNA that they have found, then after that they run it through many different tests to determine the type. After they do their line-ups, and they convict him by matching the
