Laurel Guthrie (Christina Jackson) is a villainess from "Stockholm Syndrome," episode 1.12 of Bull (airdate January 24, 2017).
Laurel Guthrie was introduced as one of a number of mock jurors in the beginning of the episode, and she was later shown dumping a coffee canister in the trash can inside the women's bathroom. While she was seated in position #18, Jason Bull and his crew noticed that she was fidgety, and after seeing her duck for cover, Bull realized that there was an explosive in the building, which went off after the crew ducked. Laurel turned villainous after the explosion, when she appeared and pointed a 3D-printed gun at everyone, which also revealed that she was the one who planted the bomb (the aforementioned coffee canister).
Laurel revealed her identity as the wife of Gordon Guthrie, and that she ran a pharmacy with him. Gordon was in prison serving a 15-year sentence for manslaughter, as it was alleged that Gordon used the pharmacy as a front to distribute drugs, leading to a turf war between him and dealers Tommy and Bobby Vega. The rivalry led to Gordon killing Tommy, and in his trial, he took a plea deal (he was facing life in prison). Laurel's main motive was due to the fact that Gordon was being moved to the same prison that Bobby was locked up in, fearing that Bobby would get revenge for his brother, with Laurel proclaiming that Gordon was purely innocent of the crimes he was accused of committing. Her main target was Danny James, who was on the case during her time as an FBI Agent, as she pointed her gun at Danny.
Bull convinced Laurel to put down her gun and allow a mock trial to take place, which ended up resulting in a not guilty verdict in Gordon's favor. However, Bull asked Danny when Gordon ended up on her radar, with Danny revealing that he was meeting with the Vega brothers and making small buys with them, while adding that they wanted to up their purchases. This revealed that the Vegas had been to the pharmacy and knew about Laurel, and while Danny gave her description of the assailant, Laurel completed her last detail about the assailant wearing a blue and orange New York Islanders cap, leading Laurel to realize that Gordon really was a criminal and a killer, which had all been unknown to Laurel.
Laurel was handcuffed and arrested for her own crimes, stating that she never meant to hurt anyone. Bull agreed with Laurel's statement, while adding that Gordon did mean to hurt someone, and he used all of his powers to keep her from finding out about his criminal and murderous intentions.