New mayor vows to fight violence in Mexico city days after his predecessor was killed and beheaded CBS NewsMexican mayor’s severed head placed atop pickup truck 6 days after taking office Fox NewsAnger and disgust in Mexico over beheading of newly sworn-in city mayor The GuardianAfter newly elected mayor is beheaded in Mexico, others ask federal authorities for protection CBS NewsMayor of city in Mexico killed in apparent decapitation USA TODAY