LOS ANGELES (CBSLA.com) — A prosecutor with the Los Angeles County District Attorney’s office has been reassigned after a bitter campaign against newly sworn-in District Attorney Jackie Lacey.

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Alan Jackson, one of the top trial lawyers in the District Attorney’s office, will be transferred to a position where he will no longer try cases in a courtroom, according to the Los Angeles Times.

A spokeswoman for Lacey issued a statement calling it a lateral move for Jackson with the same pay and rank. She described the move as being part of an office shakeup involving several managers.

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Jackson – who successfully prosecuted high-profile cases involving music producer Phil Spector and the cold case murders of motor racing legend Mickey Thompson and his wife – was named “Prosecutor Of The Year” in 2010.

Lacey ran among five other prosecutors in the campaign to replace Steve Cooley, but she was the only one to earn Cooley’s endorsement.

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Jackson told the Times he views the move as a step backward in his career, but has not yet announced his future plans.