Is a single hair root enough evidence to prove a auto hit and run arrest?

A single hair root would be excellent DNA evidence; if one could find a single hair root. Now, if it were attached to the hair, would be a different story. But, I don't think this sort of DNA evidence would come into play in a hit and run arrest. How would the hair root be found amongst car accident debris?

If the hair root is imbedded in the grill of a car, it's pretty good circumstantial evidence that the victims head was at some point in time in physical contact with that car.

Really need more information to give an accurate answer to this question, so why don't you give us all the information your homework has provided. For example, where was the hair root found? Who does the hair root belong to? Give us everything, then tell us what you think as well. With this info, the question cannot be answered, or the answer would be no, due to limited info.

One hair root is enough to prove identity. If it can prove a crime depends on where and how it is found.