Stock Photo: Tattoo on the arm of a former Mara, a former hired killer and member of a gang of youths, each of his 72 murders was honored with a tattoo, today the 29_year_old works as computer science teacher at the vocational school of the human rights organization E. Tattoo on the arm of a former Mara, a former hired killer and member of a gang of youths, each of his 72 murders was honored with a tattoo, today the 29_year_old works as computer science teacher at the vocational school of the human rights or