The police found fingerprints on the outside of the cab on the post between the driver's door and the back door. These were not "bloody fingerprints" but, rather, fingerprints which showed traces of blood. I have spoken to one expert who worked with these prints during the original investigation and another who had recently examined the prints in question. Both stated that the prints were not "bloody" but showed traces of blood-- specifically, there was some blood which had worked its way into the ridges and swirls in the otherwise latent print. This means that the print was made by a living human hand and was formed in the body oils released by the skin of the finger, but some blood which was most likely on the killer's hand ran into some of those ridges and swirls, forming a mixed print-- meaning, a latent fingerprint which shows traces of blood.
The odds and the evidence overwhelming demonstrate that these prints were left by the person who killed Paul Stine and no one else.