|Family|| Brooke Thornburg (wife)|
Tricia Thornburg (stepdaughter; deceased)
Brian Thornburg (son with Tricia)
Josh Thornburg (son with Brooke)
They both went to St. Raymond's University together and they frequently run into each other at functions. He is married to a woman named Brooke, with whom he had a son named Josh. He was a suspect in the statutory rape of his stepdaughter when she was eleven years old, which led to her pregnancy with a son called Brian at age twelve. He and Brooke both raised Brian together. When Thornburg got shot by an assailant, he was rushed to a hospital, and Stabler and Benson got a court order for his DNA. The evidence showed he indeed raped his stepdaughter and he is the father of Brian. Cragen visited the judge in hospital and told him they got DNA evidence that verified he was Brian's father. The judge told the captain he searched the depths of his soul and for the life, and yet, he couldn't find an answer.