Angela Salvatore had been away from her father’s hospital bedside for just over an hour when she says she got a frantic call from a nurse, pleading with her to calm him down.

After she rushed back to his room, she alleges ashen-faced staff delivered an alarming message: her father had mistakenly been given 10 times the prescribed dose of an antipsychotic drug.

As the night went on, Salvatore says she and her mother watched helplessly as her father, Benito Salvatore, went through waves of confusion, agitation and eventually delirium. Then, less than 12 hours after the hospital’s call, his heart stopped, she says. He couldn’t be revived.