Rodolpho Ramirez (right) and Adan Peraza (center) are escorted back to their lodges by corrections officer Darren Levantonio at YDDC. Although state officials say the center will be a model for rehabilitating violent teen offenders, critics say it mixes some of the state's most violent kids with some of its most vulnerable - with terrible results. "It used to be the clients were assaulting each other; now they assault the staff," says guard Roger Stansbury, a 14-year veteran of YDDC. "The only safe place for me is on graveyard (shift). The majority of the time they sleep. . . . Like so many of the kids, I've gone into survival mode."