The gunman who held intensive care unit staff hostage at UPMC Memorial Hospital in Pennsylvania before killing a police officer and injuring five other people Saturday believed that more could have been done to save his wife,

A man who took hostages at UPMC hospital during a shooting that killed a police officer and wounded five others highlights the rising violence against U.S. healthcare workers.

A shooting at UPMC Memorial Hospital Feb. 22 in York, Pa., left the suspected gunman and a police officer dead and injured others, according to multiple outlets. AHA President and CEO Rick Pollack Feb.