A man who became distraught as he was being briefed on his mother’s condition by a surgeon at Johns Hopkins Hospital here pulled a gun and shot the doctor on Thursday, then killed his mother and himself in her room at the medical center, the police said.
The doctor, who was wounded in the abdomen, was expected to survive. He was identified by colleagues as Dr. David B. Cohen, an orthopedic surgeon.
The gunman, Paul W. Pardus, 50, had been listening to the surgeon around midday when he “became emotionally distraught and reacted ... and was overwhelmed by the news of his mother’s condition,” Commissioner Frederick H. Bealefeld III of the Baltimore police said.
Mr. Pardus pulled a semiautomatic gun from his waistband and shot the doctor once, the commissioner said. He then holed up in the room in a standoff of more than two hours that led the authorities to lock down a small section of the building while allowing the rest of the sprawling medical complex to remain open.
A man shot a faculty physician as well as his own mother before killing himself at  in Baltimore, Maryland. The shooting occurred on the eighth floor of the Nelson Building, the hospital's main building. Baltimore police found the suspected shooter, who had been barricaded inside his mother's hospital room for several hours before killing himself and his mother.

At around 11:15 a.m.  (1515 ), an unnamed doctor was shot in the chest at a patient area of the Nelson Building's thoracic center. All major hospital facilities were placed under a lockdown, and some medical personnel were evacuated from the Nelson Building. The doctor was sent to surgery at the hospital, and police spokesperson Anthony Guglielmi said that the doctor will likely survive the incident. He was not aware of any connections between the suspect and the doctor, who was in critical condition.

A nurse at the hospital told '''' that the shooter was dissatisfied with how his mother had been treated and even said that he was going to jump out of a window. The nurse said that, upon hearing gunshots, she ran.

Earlier, Baltimore area police said that they were "in the process of a tactical operation" to capture the gunman, who was holed up on the eighth floor. A spokesperson for the  (FBI) said that it had been assisting local police in the incident. A Johns Hopkins spokesperson had previously said that authorities had taken the shooter into custody, but police said that the report was incorrect.

The suspect, who had not taken any hostages, was described as a black man in his thirties. After a standoff lasting for three hours, law enforcement officers moved into his mother's hospital room, and found both him and his mother dead from gunshot wounds to their heads. The suspect was first identified as 50-year-old Warren Davis, and his mother as Jean Davis. Police later said that "Warren Davis" was an alias and that his real name was not known.

Baltimore Police Commissioner Frederick Bealefeld, who said that the department is "treating this case as a murder-suicide," said that no officers reported hearing the shots that killed the two.  Police had previously said that the gunman had been shot and killed by police, but police later said that that report was incorrect.