February 17, 2009 ABC Nightline

For years, Travis had been a local celebrity in his hometown. He featured often on TV adverts, and would pose for photographs performing his favourite tricks: tucking into a filet mignon, dressing himself or using a computer. But yesterday the pet chimpanzee went berserk, attacking a friend of his owner's and causing terrible facial injuries before turning on a police officer who shot him in self-defence.