A professor at the Massachusetts Institute of Technology has been shot and killed at his home, authorities said. Nuno F.G. Loureiro, 47, was found Monday at his house in the upscale Boston suburb of Brookline. He was taken to the hospital with gunshot wounds and was pronounced dead Tuesday, officials said. The DA's office said a homicide investigation is ongoing. Read more: https://abcnews.visitlink.me/Wz16d- | ABC News