“The Worst Story I Ever Heard: The Davises Are like Any Other Family, Only instead of a Son, They Raised a Chimpanzee. As With Travis, the Chimp That Attacked a Woman Who’s Finally Speaking Out, for Years Everything Seemed Fine. Then Something Strange and Horrifying Happened—Though Not Necessarily What You’d Think”, 2009-11-11 (; backlinks):
[The story of a couple who raised a chimpanzee (Moe) as their surrogate son. After many years, Moe was taken away from them because he bit another person.
They visited Moe in the sanctuary which also sheltered other chimps. One day they brought Moe a birthday cake, and the other chimps were watching Moe eat the cake. Those others were out of their cage for some reason. They viciously attacked and mauled the man, biting off his face and genitals before they could be stopped, and didn’t even eat the cake.]