Health care workers came together at a vigil Sunday, expressing grief and anger, saying Alex Pretti was killed senselessly. "I was angry, upset because this could've happened to me. I would've done the exact same thing. I'm a nurse, I help people. If I see someone that needs help, I'm going to help them," Catherine Cheaye said. Catherine Cheaye was one of about 100 health care workers who all felt the same pain, sorrow and anger at the deadly shooting.