Group hopes anti-slavery laws will free the whales

A Kiwi scientist is behind attempts to free orcas from American marine parks by citing ancient anti-slavery laws.

Dr Ingrid Visser is one of five people filing a lawsuit seeking to apply a constitutional right from 1865 to free five orcas from the slavery of performing at marine parks.

The five orcas or killer whales are at two Sea World parks in the United States and have all been in captivity for about 20 years or more.  Full Read