A beloved Brooklyn hospital worker who was found slain in her apartment had taken in her older brother to care for him — only for him to allegedly strangle her, according to friends and police.
Pals and co-workers who spoke to The Post this week saw it as the ultimate betrayal of caring Mary Fagan, 64, whose body was discovered by EMTs July 26 in her Crown Heights home.
“She took in her brother and that’s the same hands that killed her,” one nurse who worked with Fagan at New York Presbyterian Hospital said.
“I was really sad before. But at this point, it makes me really angry, because she talked about her brother all the time,” the woman, who requested anonymity, said…