I don't know but we had a cat that got really upset (at least acting that way) whenever she saw our suitcases as we were packing for a trip. Likely she was just upset that we would not be there to give her food in the usual schedule. Any other cats we had never exhibited that behavior.
They do exist, it's just that the negative always gains the spotlight over the positive in the news so that's what you usually hear about. The cop himself said in the interview that the other officers have also done things like this before but it wasn't something they gloated about.
An adult chimp, that is :D