Almost Unsolved Season 1 Episode 22 Overlooked

On his first night in town a man is brutally stabbed to death and his body dumped along a dirt road. Some acquaintances he had met earlier that day turn in his blood-stained car to police believing it to be the scene of the crime. With no witnesses the DA refuses to try the case. Years later, detectives re-examine the case, testing decade's old evidence with modern DNA technology.