Bull

As a railroad cop, or Bull, Preston Tyler's job involves plenty of danger, but he never dreamed he'd be called on to solve a series of bizarre murders marked by strange symbolism.  Pres and his K-9 partner, Sinbad, find the first corpse near the Mexican border, hanging upside down in a tunnel. The killing seems linked to a Mexican witchdoctor, or brujo. Then bodies show up all along the railways in the Southwest, but because they are all hobos--no one cares except Pres. But when a railroad executive's son goes joyriding and becomes the killer's latest victim, suddenly everyone is interested. The FBI is called in, and Pres locks horns with them as they disregard the evidence he has gathered at great risk.  Meanwhile the FBI arrests the wrong man, and Pres is forced to pursue the killer on his own. He has no choice--the killer has made it personal.