Nestle is on the receiving end of a Twitter backlash after its Mexican "Crunch" chocolate account compared the candy to the disappearance -- and murder -- of 43 student teachers from Iguala. The tweet referred to the probable murder of the students in September -- to which three cartel members admitted to burning in a rubbish dump -- a crime which has shaken the nation. The tweet -- which was quickly deleted after being posted at 12.01 a.m. on Sunday -- suggested that the missing students were 'Crunched' in an attempt to promote the candy bar.