While not much is known about Leah's early life, it is revealed that she once served as a firefighter. In her line of work, Leah faced death and danger on a regular basis and often would do "crazy things to save other people's children." In Unconditional Love, the season three premiere, Leah leaves the team to deal with a family emergency. She returns in season five, in the episode Run To Me, after Raf leaves the team. It is then revealed that she left to assist her parents after the Haiti earthquake.