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,

Violence against healthcare workers is on the rise as seen by an attack at a Pennsylvania hospital. A gunman took hostages before exchanges of gunfire that killed a police officer and wounded five other people at a York County,

Investigators are trying to determine why a man targeted a Pennsylvania hospital, taking workers inside the intensive care unit hostage and holding one staff member at gunpoint as her hands were bound by zip ties.