28. Maria Jimenez
Maria is one of Mexico’s most prolific female assassins, who confessed to murdering around 20 people and taking down the dangerous Zetas drug cartel.
Maria, who was nicknamed La Tosca, got paid around $1,500 a month to kill rival drug traffickers and police officers. In 2012 she confessed to her crimes and was charged with murder and a few other petty crimes.