(JTA) – Dr. Michael Davidson, a cardiovascular surgeon at Boston’s Brigham and Women’s Hospital, was shot and killed by a former patient’s son. Davidson, 44, was shot twice on Tuesday morning, Jan. 20 in an exam room at the hospital, according to the Boston Globe, and died after undergoing emergency surgery. The shooter, Stephen Pasceri, 55, was subsequently found dead of an apparent self-inflicted gunshot.

Davidson, the director of endovascular cardiac surgery at the hospital and an assistant professor at Harvard Medical School, had treated Pasceri’s mother last summer. Pasceri’s siblings said that Pasceri came to blame Davidson for their mother’s subsequent death, according to The Associated Press.

Davidson, a father of three, was an active member of Temple Beth Elohim in Wellesley, Mass. His wife, Dr. Terri Halperin, a plastic surgeon, is seven months pregnant.