As Mexico drowns in drug prohibition related bloodshed — suffering almost 12,000 murders in 2010 — it is perhaps unsurprising that government critics turn up their screaming that the war on drugs isn't working. But it was a bit of a bombshell when former president Vicente Fox added his voice to the chorus. The cowboy-boot wearing leader, who ruled Mexico from 2000 to 2006, had once declared the "mother of all battles" against crime and rounded up drug kingpins.