OAKLAND — A court-appointed lawyer is taking over an investigation of a police department internal affairs inquiry into the sexual misconduct scandal involving the teenage daughter of a dispatcher.

In a court order issued Tuesday, U.S. District Judge Thelton Henderson wrote that attorney Edward Swanson will look into the handling of the Oakland police internal affairs case, apparently not satisfied with the city’s own investigation.

Swanson, in a probe to find out who knew what and when, now has the ability to review privileged correspondence from the Oakland City Attorney’s Office under Henderson’s order. A spokesman for the City Attorney’s Office did not immediately respond for comment.

“Evidently the city was supposed to do an investigation, it hasn’t happened to his satisfaction, so he’s appointing Mr. Swanson to do it instead,” said civil rights attorney Jim Chanin.

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Police sex scandal: Ex-Livermore cop pleads no contest, ‘walks away scot-free’ It has been nearly a year since Henderson first issued an order referring to the city’s internal affairs investigation. The investigation was related to the September 2015 suicide of Officer Brendan O’Brien, who left a suicide note naming officers allegedly involved with a teenager who previously went by the name Celeste Guap.

The young woman has claimed to have had sex with dozens of officers from multiple Bay Area police departments. The allegations led to Chief Sean Whent’s resignation in June, and charges filed against six officers from Oakland, Contra Costa and Livermore accused of either having sex with her while she was underage, exchanging goods for sex or accessing criminal databases despite being unauthorized to do so.

In June, Mayor Libby Schaaf and City Administrator Sabrina Landreth said the city was hiring outside legal counsel to review the police department’s internal investigation and probe for leaks from the city to media. It was unclear Wednesday if the attorney, Morin Jacob of Liebert Cassidy Whitmore law firm, still works for the city, but no reports from the firm have been made public. Jacob did not return a call for comment.

Last week, the East Bay Express reported that several city employees knew about the case early on. The publication obtained emails showing members of the city attorney and city administrator’s offices were notified of the allegations as early as November and December 2015, months before Schaaf and Landreth said they knew about it. Swanson, the court-appointed attorney, was among those who received an email on the matter.