From breitbart.com:
An MS-13 gang member nicknamed “Animal” has been convicted and sentenced to prison for the murder of a 15-year-old boy in East Boston.
Joel Martinez, also known as “Animal,” is a 23-year-old national from El Salvador and a member of the violent MS-13 street gang, according to the Boston Herald.
In September 2015, Martinez told a federal informant that he stabbed 15-year-old Irvin Depaz three times and left him for dead on the street in order to be fully inducted into the MS-13 gang.