Chicago Police officers walk outside Mercy Hospital on the city’s South Side where authorities say a shooting at the hospital has wounded multiple people, including a suspect and a police officer, Monday, Nov. 19, 2018, in Chicago. (AP Photo/Amanda Seitz)
Law enforcement officials work near Mercy Hospital in Chicago, Monday, Nov. 19, 2018. A shooting at the Chicago hospital has wounded multiple people, including a suspect and a police officer, authorities said. Shots were fired Monday, at Mercy Hospital on the city’s South Side, and officers were searching the facility. Police issued a statement on Twitter saying there were “reports of multiple victims.” (Zbigniew Bzdak/Chicago Tribune via AP)
Chicago Police Superintendent Eddie Johnson, left, and Mayor Rahm Emanuel speak Monday, Nov. 19, 2018, during a news conference at the University of Chicago Medical Center, in Chicago, after a gunman opened fire at Mercy Hospital, killing a police officer and two hospital employees. (Chris Walker/Chicago Tribune via AP)
CHICAGO — An argument outside a Chicago hospital turned deadly when a man pulled out a gun and killed an emergency room doctor with whom he was having a domestic relationship, then ran into the hospital and fatally shot a pharmacy resident and a police officer, authorities said.