Will Democrats stop lying & saying that illegals dont behead Arizonans now that it has been proven to be true?

Your question is fallacious. Actually, what Democrats said was that Gov.Brewer (R-AZ) was lying when she repeatedy said headless bodies had been found in the Arizona desert. Eventually, Brewer admitted her statements were "wrong". Now, months later, 1 person has been found decapitated in an apartment.