Professional killers hired by Mexican drug cartels kidnap, murder and torture rivals, with some hitmen as young as 12 years old.<br /><br />In this Al Jazeera special, Mariana Sanchez interviews one of the contract hitmen who says he has even killed friends and family members for "disrespecting his boss".<br /><br />Al Jazeera warns that some viewers may find the content in the interview disturbing.<br /><br />[November 22, 2010]
