Another name for a police metal detector is CSI equipment and/or CSI Ground Search Metal Detectors. These types of metal detectors are used on crime scenes for investigation purposes.
A crime scene could have many reasons why police officers may use a CSI ground search metal detector. One of the most common reasons is to look for shell casings or a bullet. These police investigation metal detectors work very similar to a traditional metal detector but are more fine-tuned for police investigations.