“That was in 1998, and at the time it seemed like a turning point in the decades-long fight over circus elephants. For years, animal rights organizations had been releasing horrific undercover videos showing Ringling trainers abusing elephants, but USDA investigations never produced evidence that officials deemed strong enough to warrant action. Now there was a dead body—and a recent precedent. The agency had just fined the King Royal Circus, a small family operation, $200,000 for allowing an elephant to die in an overheated trailer of an untreated salmonella infection.”
http://www.motherjones.com/environment/2011/10/ringling-bros-elephant-abuse