>> wint was a welder at aiw from 2003 to 2005, and sources say he had a reputation as a problem employee, but is wint capable of torturing and murdering four people by himself? >> how do you restrain multiple people? i mean, these things can happen, but the simplest explanation is there's somebody else there committing the crime, you know, actually holding these other people down while a knife is held to the throat of the son. >> for now police only tie wint to the crime. a team of federal agents begin a massive manhunt. they track wint to his girlfriend's home in brooklyn, new york. next, the high stakes manhunt comes to a boiling point, and wint is not alone. >> it was really intense. we made everybody come crawling out one at a time.