This has been going on for quite a while as others have stated. I don't know of any cases in AZ that I'm aware of concerning deer/elk populations. You can get dead deer species tested here for CWD. AZ does not allow wild game deer species to be taken/hunting brought into AZ from any state that hasn't been properly caped, brains removed, cut up and packaged, and there is probably other things also, basically we don't want CWD to be spread here. One thing we are very conscious about when we are field dressing a deer species is to not cut the spinal cord and get spinal fluid on any parts of the meat or ourselves, brain matter included. Of course there are times if a person hit's the spine and fluid spreads , then get it tested before eating.