Brian Coyle is the younger brother of Shannon Coyle and the half-brother of Aidan Connor. Brian was born from an affair between his mother Susan Coyle and the kids' collective father Jason Connor.
History[]
Brian was born after Shannon from Jason's and Susan's affair, with his mother creating an imaginary father always on business to avoid detection.
After some years, Jason wanting to leave his wife Debra Connor for Susan. Brian was a witness to Jason and Susan splitting Aidan and Shannon up from each other when they met and started dating, but Aidan and Shannon continued to be in love and even have sex.
When Shannon got pregnant, Jason told her the truth, leading to her fighting him, falling, and dying from hitting her head. Jason and Susan planned to expedite their plans to leave the country with Brian, and Brian was questioned when Shannon was found. When it was discovered that Shannon was pregnant by her brother, he was a suspect but he denied doing anything to his sister.
After Jason was shot dead, Susan and Brian were taken into custody. In court, Susan later revealed the details of the affair with Jason and the conception of their children, much to the shock of Brian who realized what he was born into and by the truth of his sister’s murder.
Susan was cleared of the murder after it was revealed that Debra flew into a rage over the affair, and Debra and Susan are arrested. Left without their parents or sister, Aidan approached Brian to discuss their collective future as a family. (SVU: "Families")