Acapulco has become one of Mexico's, and the world's, bloodiest cities. It saw a stunning 127 murders per 100,000 people in 2019, making it the most murderous city in the world. It's a long way from it's previous reputation as the premier vacation destination for the rich and famous with everyone from JFK to Frank Sinatra to Liz Taylor singing it's praises. So how did a tropical paradise go from spring break hotspot to shootouts and severed heads?