She and three security guards had responded to the scene from the nearby Key Campus, a homeless solutions hub in the heart of the Zone. one of the security guards said, trying to cut her off. Lionheart security guards work to keep a scene clear during an emergency so first responders can access it, Ethan Caen, the general manager of Lionheart Security, wrote in an email. Homeless service providers often employ low-paid contractors who don’t have proper training, she said. “They have no authority as security guards to shove people like that.”