Mara the Lioness domesticated dog. Along with animal lovers, naturalists and experienced game wardens, they held the belief that integration back into the wild would harm Mara, rather than benefit. Mara did not fear man and indeed went out of her way to approach and play. This posed an enormous risk to her safety. In addition, release into the wild would place Mara and the other lionesses at risk of contracting "Babesia". Domesticated animals have no resistance to the fatal disease, a fact which George and Joy Adamson knew. Their lion Elsa had died of the same disease not less than two years
George Adamson and devoted himself to raising lions who could not look after themselves and training them to survive in the wild. In 1970, he moved to the Kora National Reserve in northern Kenya to continue the rehabilitation of captive or orphaned big cats for eventual reintroduction into the wild. George and Joy separated in 1970, but continued to spend Christmas holidays together until she was murdered on 3 January 1980. On 20 August 1989, George Adamson was murdered near his camp in Kora National Park, by Somali bandits, when he went to the rescue of his assistant and a young European