The jigsaw puzzle identification of a hit-and-run automobile

A suspected automobile was identified in a hit-and-run death of a 40-year-old male by matching a tiny nonspecific fragment of tissue attached to the gasoline line clip of the undercarriage with an avulsed area on the hypothenar area of the palm of the hand. There was no ostensible damage to the auto and there was an absence of clothing remnants, blood, and other tissues and an absence of paint pigments on the victim or victim's clothing.