4,000 killings were murders. we are joined tonight by one of those law enforcement heroes, i special agent elvin hernandez. when elvin -- [applause] -- thank you. when elvin was a boy, he and his family legally immigrated to the united states from the dominican republic. at the age of eight, elvin told his dad he wanted to become a special agent. to date, he leads investigations into the scores of international sex trafficking. elvin says that if i can make