During the early part of Season 8, Jing-Mei is having a hard time as an authority figure in the ER. Weaver is pressuring her about being indecisive. In the episode "The Longer You Stay", Jing-Mei and Dr. Dave Malucci make a hasty decision to perform a procedure before checking all necessary tests, ultimately leading to the death of a patient who is later found to have symptoms associated with Marfan syndrome.
Because of this mistake, and her history as a medical student, the Risk Management staff, Dr. Robert Romano and Dr. Weaver agree to have her resign as Chief Resident; in addition, Weaver fires Malucci. The board determines that because of her maternity leave, she did not have Attending status at the time of the incident and was therefore not authorized to make the decision for the procedure. Weaver, the Attending on shift, was off campus at the time and did not answer her pages, meaning that the procedure was unauthorized. As a result, Jing-Mei quits.