At night, Isabel appeared in the cages area, where Jack was being held. She read out-loud Jack's tattoos, saying that the 5 and the star are cute, but the Chinese is quite ironic. She introduces herself, and asked him to come with her, so she could ask him some questions. ("Stranger in a Strange Land")
Isabel was in charge of Juliet's arrest in Danny's murder and Ben's attempted murder investigation. She summoned Jack, Tom and Juliet to an office, where she questioned Jack on whether Juliet asked him to kill Ben or not. Jack lied, and said that he was lying to Tom to create chaos. She knew he was lying, and asked him why would he lie for Juliet. He, on the other hand, asked to go back to his cage. ("Stranger in a Strange Land")
Right before the verdict about Juliet's execution, Jack and Alex interrupted, with a message from Ben, who ordered Isabel to stop the execution, but to "mark" her. Later that day, at sunset, she recites the supposed translation of Jack's tattoo to him: "He walks among us but is not one of us." Jack replied, "That's what they say, but it's not what they mean." The Others, with Jack, left the Hydra Island on a yacht, back to where "home" is, according to Ben. ("Stranger in a Strange Land")
From The TV IV:
After Danny Pickett was shot and killed by Juliet Burke, Juliet was detained by the Others. Isabel brought Juliet, Tom and Jack Shephard to her office at the Hydra in order to sort out conflicting testimony of how Juliet wanted Ben dead. Jack lied for Juliet, but Isabel was able to see through it. She later brought Juliet to stand trial for her crimes of killing one of their own; a trial that Alexandra Rousseau believed already had a predetermined outcome of death. Juliet's execution was commuted by Ben, which appeared to upset Isabel, but Juliet was still ordered to be marked for her crime.
Disclaimer: Isabel, the sheriff, is a fictional character on the ABC television series LOST. He is played by Diana Scarwid.
LOST was created by J. J. Abrams and is a sole property of ABC.
Isabel appears here solely for the purpose of role playing and having fun. No profit is made off of his name, except for extending the enjoyment I feel for this great show.