Marysol Domenici's last day with BART was Wednesday, said BART spokesman Linton Johnson. But he would not comment on why she is no longer employed by the agency or whether she had been fired.
She was on paid administrative leave since the shooting until Wednesday. Her lawyer, Alison Berry Wilkinson, told reporters that Domenici would appeal the decision.
Domenici and fellow BART officer Tony Pirone were the first officers to respond to a call Jan. 1, 2009, that a fight had broken out on a BART train near the Fruitvale station in Oakland. Pirone is still employed with BART but is on paid administrative leave.
Johnson would not confirm reports that an internal investigation of the shooting conducted by the firm Meyers Nave recommended that BART fire Domenici and Pirone. Public portions of the document criticized the response by BART police.
BART board members were not willing to comment on the firing.
Former BART officer Johannes Mehserle is charged with murder in the 22-year-old Hayward man's death. Mehserle's defense attorney, Michael Rains, has said Mehserle shot Grant by mistake, that he meant to use his Taser.
The trial was moved to Los Angeles last year after an Alameda County judge ruled Mehserle could not receive a fair trial in the county. The shooting was
In a preliminary hearing last year, Domenici described a hectic scene before Grant was shot. She said it wasn't even close to being under control. Domenici, at the time a four-year member of the BART police force with no previous experience as a police officer, said passengers aboard a crowded Dublin-bound train harassed her and Pirone as soon as they reached the platform and tried to figure out who was involved in a fight on the train.
Domenici said she feared for her life as she tried to get Grant and three of his friends to sit down against a wall. She said she waited for what felt like an "eternity" for help to arrive.
Mehserle, who was arrested in Nevada about two weeks after Grant's death, quit the BART police force shortly after the killing. He will be back in court Friday to set other court dates. His trial is expected to begin in June.
Staff writer Denis Cuff contributed to this story.