Mara Salvatrucha (MS-13) is an international criminal gang that originated in Los Angeles, California. It has spread to other parts of the United States, Canada, . Mara Salvatrucha (MS-13) is an international criminal gang that originated in Los Angeles, California. It has spread to other parts of the United States, Canada, . Mara Salvatrucha (MS-13) is an international criminal gang that originated in Los Angeles, California. It has spread to other parts of the United States, Canada, . This documentary shows how a 16-year-old is capable of handling the destinies of an entire neighborhood in a suburb of San Salvador with his gang, there is .