Sometime during the day on New Year's Eve 1977, Fossey's favourite gorilla, Digit, was killed by poachers. As the sentry of study group 4, he defended the group against six poachers and their dogs, who ran across the gorilla study group while checking antelope traplines. Digit took five spear wounds in ferocious self-defense and managed to kill one of the poachers' dogs, allowing the other 13 members of his group to escape. Digit was decapitated, and his hands cut off for an ashtray, for the price of $20. After his mutilated body was discovered by research assistant Ian Redmond, Fossey's group captured one of the killers. He revealed the names of his five accomplices, three of whom were later imprisoned.