Not exactly sure if you're implying that this family member protected Conlin, or what.
The family member that was employed in the judicial system was Kelley Blanchet. She was a niece of Conlin. As an adult, she was an Assistant Municipal Prosecutor in Atlantic City. (A month after the abuse allegations became public, she became the Chief Municipal Prosecutor in Atlantic City.) She was abused by Conlin when she was around 7. Her father later confronted Conlin.
She was part of bringing the allegations to the public. Reportedly, she did not see Conlin for years, but she attended the funeral of his wife, and learned that Conlin had grandchildren. Out of concern for the grandkids, she confided in a female relative of what Conlin had done to her as a kid, and the female relative responded that Conlin had sexually abused her for years when she was a child.