Replying...
Intro. A New York County Assistant District Attorney and single mother, Erin is the second child and only daughter of the current New York City Police Commissioner Frank Reagan and his wife Mary. She grew up in Bay Ridge, Brooklyn, with her three brothers—Danny, Joe, and Jamie. Throughout the series, it’s hinted that she had a bit of a rebellious streak in her youth.

Erin Reagan-Boyle

@Anandhu