The Colorado high court ruled in favor of Cheyenne Mountain Zoo after an animal rights group alleged the park's elephants were 'unlawfully confined.'

History will look upon this ruling as a grave injustice,” animal law professor and director of the Animal Activist Legal Defense Project Justin Marceau said.

The court ruled Tuesday that elephants couldn't be released because animals don't have the same rights as humans. The group that filed the suit said that the animals were experiencing stress, physical issues,