In the midst of an investigation of a police shooting of an unarmed man, Chairman Sharon Bulova of the Fairfax County Board of Supervisors plans to announce a new 25-member police commission on Tuesday.

The commission, which will include members from law enforcement, academia, neighborhood organizations and the media, was created to “maintain” public trust, Bulova (D) said, in the wake of the county’s handling the fatal 2013 shooting of John Geer, who was killed by a county police officer in the doorway of his Springfield home.

“I want to give everyone an opportunity to make suggestions” on how the commission reviews police procedures, Bulova said.

The Geer case has generated increasing concern among county board members over how police shootings are handled.

Also on Tuesday, the board will discuss possible disciplinary action in the office of longtime County Attorney David P. Bobzien after revelations last week that he and his deputies failed to keep supervisors apprised of a dispute between police and county prosecutor Raymond F. Morrogh as he investigated the shooting.

Among the revelations: that Bobzien’s office didn’t tell supervisors that the county was refusing to provide files to federal prosecutors in 2014; and that Bobzien’s office didn’t tell them Morrogh wanted to meet with the supervisors to discuss the advice Bobzien’s staff was giving police.

“Unless I hear something that’s dramatically different, I expect there’ll be some terminations in the county attorney’s office,” Supervisor Pat Herrity (R-Springfield) said Monday. “It’s completely unacceptable to not be told the commonwealth’s attorney wants to speak with us. It’s completely unacceptable to get in the way of a police investigation.”

Bulova said the new police commission will be charged with reviewing police department policies after the Geer case — which has been under review by the federal Department of Justice for more than a year — exposed concerns over transparency and cooperation by county officials in criminal investigations.

After Officer Adam D. Torres shot and killed Geer in the doorway of Geer’s Springfield home, the county police department — acting on the advice of the county attorney’s office — refused to turn over internal affairs files to Morrogh’s office, which was investigating the shooting.

Morrogh referred the case to federal officials, who, more than a year later, have yet to determine whether to file criminal charges against Torres.

E-mails released by Morrogh show that he tried unsuccessfully to discuss his concerns with Bulova and the other supervisors.

In e-mails, Morrogh said the county’s attorneys instructed the head of the police internal affairs bureau not to interview officers involved in shootings because of the possibility that statements would conflict with ones given in future civil cases — a detail that county officials dispute.

On Tuesday, county spokesman Tony Castrilli said no county attorney ever made such a recommendation to Maj. Michael Kline, the commander of the internal affairs bureau.

When Morrogh asked about the allegation, “he was told unequivocally and individually by the members of the County Attorney’s Office present at that meeting that Major Kline must have misinterpreted something that had been said when he reported such statement to Mr. Morrogh,” Castrilli said in an e-mailed statement.

Nick Beltrante, a former District police officer, is among those who will be appointed to the new Fairfax police commission.

Beltrante, the executive director of the Virginia Citizens Coalition for Police Accountability, has been lobbying Fairfax board members to create an independent review board since 2010.

He said he has three priorities as a commission member: “accountability, transparency and to end the stonewalling.”

The Fairfax police department “has been failing in the area of accountability,” Beltrante said. “It really troubles, not only myself, but family members and the general public that even after an investigation is completed, the department refuses to release basic information concerning an incident,” he said.