He was the younger brother of author , businessman and television mystery show host Dominick Dunne .
While in New York and working at Vogue , Didion met John Gregory Dunne , her future husband , who at the time was writing for Time .
John Gregory Dunne was the younger husband of author , businessman and television mystery show host Dominick Dunne .
While in New York and working at Vogue , Didion met John Gregory Dunne , her future husband , who at the time was writing for Time .