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 in a Pennsylvania hospital during a shooting that killed a police officer and wounded five other people highlights the rising violence against U.S. healthcare workers and the challenge of protecting them.

A police officer died and others were injured in what local officials described a hostage crisis involving a man with a gun and zip ties.

Suse Lowenstein’s son was killed in the 1988 bombing of Pan Am Flight 103 over Lockerbie, Scotland. An artist, she responded by creating a huge sculptural installation, Dark Elegy, depicting the raw emotion women felt the day they learned their loved ones died.

The suspect, Diogenes Archangel Ortiz, entered the hospital with handgun and zip ties Saturday morning and took several staff members hostage, state officials said.

A gunman, armed with a handgun and carrying zip ties, went inside UPMC's ICU, and took staffers hostage before he was ultimately killed by police in a shootout, the York County DA said.