Lauren Wilson, aka Regina Preszler (Jenny Winton), was a hidden villainess from "Bring It On," episode 1.19 of Bull (airdate April 18, 2017) She was a cheerleader and the fiancee of thrice-divorced famed attorney Jules Caffrey.
After a performance, Lauren returned home and prepared a bath for herself, only to end up murdered and drowned in her own tub. Jules ended up accused of Lauren's murder, and the trial's progression unleashed a shocking revelation: Lauren Wilson was not the victim's real name, and she was actually a grifter.
During Dr. Jason Bull's inquiry with Jules, Bull revealed that Lauren's real name was Regina Preszler, and her relationship with Jules was a front, as she was conning him. It was also uncovered that the villainess went by other different aliases: Bonnie Henson in Austin, Nicole Markey in Chicago, Mandy Mitchell in New Orleans, and Robin Cleary in Indianapolis. In addition, the evil Lauren used her relationship with Jules to get on the basketball team's cheerleading squad, despite being a poor dancer. The trial ended with Jules acquitted, and it was revealed that Lauren/Regina's brother and co-conspirator Jared (aka Derek Miller) killed his sister.