When two bodies were found in a rig at a truck stop on the well-traveled route to Houston, some drivers figured it was an accident - maybe carbon monoxide poisoning. When another body was discovered there weeks later, they called it a mystery.
But now that two more bodies have been found at two truck stops, they are getting worried.
"You're scaring me now," said trucker Steve Fancher of Tulsa, Okla., when told of the grisly discoveries. "I'd better get on out of here."
So far, investigators have not established what killed the five or whether the deaths are related. But police said they might have been victims of a bad batch of drugs.
"Our experience would lead us to believe that ... this may be a case that somebody's either selling narcotics there or providing narcotics that may be laced with anything that could be lethal," said San Antonio police Sgt. Gabe Trevino.
Jimmy Holguin, chief investigator for the Medical Examiner's Office, said no causes have been determined in any of the deaths.