David, thanks for not taking my comments to heart. Craig is a respected with his regards to primates and their behavior. Every chimp that is in that group were born in captivity. If you can read some of Jane Goodalls publications, or G. Teleki's book on the predatory behavior of chimpanzees you can see that this type of behavior happens. Its unfortunate that its happened here 2 times. There have been many chimps born at the zoo without any problems. In fact the matriarch of this group was born here in 1967. I worked with chimps for several years and I agree that they can be a very nasty species to each other. However, some individuals that I worked with were very nice. All of the staff that works with the chimps have been with them for years and this death is a blow to them. The last one that died was killed by a very young male and I do not believe that it was intentional.