>> in february 2006, robert huffman was tried and convicted of failure to stop and render aid after an accident. because of his previous drunk driving offenses he was sentenced to the maximum. investigators say that without the science, this case, like most hit-and-run accidents, would probably have gone unsolved. >> to be able to establish a physical match is a rare find. to be able to solve a case and obtain a conviction is even rarer. >> it just, to me, shows the determination of law enforcement to leave no stone unturned and to really look at the scene. they did a great job, obviously, of evidence collection in this