The journalist, political aide and author was Kennedy's press secretary when he died in 1968. Mankiewicz also ran Sen. George McGovern's presidential campaign. He died Thursday night at the age of 90.
A doctor, identified as Craig Spencer, who had worked in Ebola-stricken countries with Doctors Without Borders, had been monitoring his health and arrived at the hospital today with a fever.
Angel Aguirre had been under growing pressure to step down as the investigation of the student's disappearance dragged on.