Authorities said Stephen Pasceri, 55, entered Brigham and Women's Hospital sometime before 11 a.M. Yesterday and specifically requested the doctor.
Pasceri, of Millbury, Massachusetts, shot the doctor twice just outside an examination room on the second floor of the Carl J. And Ruth Shapiro Cardiovascular Center; he then turned the gun on himself, police said.
Boston Police Commissioner William Evans said officers conducting a room-by-room search found the gunman dead in an exam room with the weapon.
Hospital officials yesterday identified the physician as Dr. Michael J. Davidson, director of Endovascular Cardiac Surgery.
Police said Pasceri wasn't a patient of the doctor's and they didn't specify a motive for the shootings.
"We're in the process of talking to witnesses, but it's leading us to believe there was something in the past that upset this guy, that made him go in and look for this particular doctor," Evans said earlier in the day.
Evans said police were on the scene within seconds after getting the first calls of shots fired and had the area secured within 15 minutes.
Betsy Nabel, the hospital's president, said Brigham and Women's will evaluate its safety protocols.
Tuesday's shooting prompted a temporary lockdown at the Shapiro center. Hospital staff were asked to remain in place and the building did not accept new patients.
