Top Ten Notorious Mexican Drug Lords

The arrest of a series of Mexican criminal kingpins, including Edgar "La Barbie" Valdez last month and Sergio "El Grande" Villarreal, offers small encouragement as Mexico tries to rein in the powerful drug cartels that have wreaked havoc across the country. TIME looks at 10 prominent gangsters who have so far evaded justice, despite rewards offered for their arrest on both sides of the border.