In one case, a car full of explosives blow up under a New York City building. The explosion caused a lot of damage and destroyed most evidence that could point to the driver.
Among the twisted metal and broken glass, however, CSIs found part of a car's frame. It had a vehicle identification number on it. Police records matched the number with a car owned by a car-rental company in New Jersey. The pol quickly arrested the man who had the car. Tire tracks can also be especially useful. Every tire has an easy to see tread, a pattern of lines in the rubber. Even without special of police can often see this pattern in mud, on grass, or even ad pear a crime scene. A case in the state a for four years to find