I've haerd over and over again that in an enhanced 911 call Burke can be heard and John saying 'we're not talking to you'. I believe the Enquirer first reported this without a source. After a call is enhanced it's played at a normal listening level but the technology has made everything clearer. With all the attention this case got and the numerous copies of the 911 call online why didn't any investigation firms (or even companies that specialize in sound) put out the enhanced 911 call for us all to hear? Surely, someone other than the FBI can also enhance recorded voices.