Two investigators for the Orange County District Attorney’s Office say their top boss, Tony Rackauckas, as well as other county prosecutors and office supervisors, covered up criminal conduct by police and hid evidence in several high-profile cases.

The accusations, which include potentially criminal behavior, were made in whistle blower claims filed Friday by investigators Tom Conklin and Abraham Santos. Both investigators said they testified about their concerns in February before the Orange County Grand Jury. And both say they believe they’ve been targeted for dismissal as a result of speaking out.

A spokeswoman for the District Attorney declined to comment.

“Both claims are personnel matters involving litigation and as such we are unable to discuss or provide additional information at this time,” wrote Michelle Van Der Linden in a prepared statement.

It is the second time this month that Rackauckas has been accused by one of his investigators of using his office to help political supporters and retaliate against those who voice opposition. Craig Hunter, the former top investigator for the District Attorney’s Office — and one of the supervisors accused of wrongdoing by Conklin and Santos — filed his own whistle blower claim against the office, accusing Rackauckas of interfering with cases involving his friends. Hunter has been asked to resign; Conklin and Santos remain actively employed as investigators.

Combined, the claims filed Friday accuse top brass in the DA’s office of interfering in three high-profile cases — a drunk driving charge involving Fullerton’s former city manager, a potential capital murder charge in Cypress, and the investigation of a would-be shooting rampage at an elementary school.

One of the allegations, listed only by Santos, involves an election night car crash by Fullerton’s then City Manager Joe Felz on Nov. 9, 2016. A Fullerton police officer, who responded to the scene, notified the city’s then Police Chief Dan Hughes, who contacted a police sergeant and allegedly told him to drive Felz home instead of arresting him.

Santos’ investigation later concluded that Hughes was calling in a favor allegedly owed by a sergeant. That sergeant, according to Santos’ claim, had once been caught having sex in a police car but was never disciplined.

“Chief Hughes covered up the misconduct by his sergeant and, when he needed him in the Joe Felz DUI/attempted hit-and-run case, (the sergeant) repaid the favor to Chief Hughes,” said the claim.

Santos’ subsequent investigation of the incident concluded that Hughes “criminally obstructed justice.” But the county never filed a charge against Hughes. Santos, in his claim, said Assistant District Attorney Ibrahim Baytieh told him, “I am friends with Chief Hughes and we are only going to be investigating the DUI and nothing else.”

A short time after Santos and Bayteih allegedly spoke about Hughes’ actions, the case was taken from Santos, according to his claim.

Hughes did not return calls for comment and Fullerton Police Chief David Hinig said he could not comment on personnel matters. Baytieh, reached at his office, referred questions to Orange County Counsel Leon Page. At the time of the crash, Hughes had already announced his intention to leave for a top security job at the Disney Resort.

The DA’s office, in March, charged Felz with driving under the influence and hit and run. He pleaded not guilty. Felz retired at the end of last year.

In another case, Conklin and Santos accused former Cypress Police Detective Susan White of perjury in the trial of Stephenson Choi Kim, who in 2011 was convicted of murder following a shooting rampage at a cafe in Cypress. In the shooting, one person was killed and several others were wounded. Choi Kim, then 31, was sentenced to life in prison plus 255 years.

The allegations by Conklin and Santos specifically say that Det. White created a false report to help the prosecution, claiming eyewitnesses had identified Choi Kim. The witnesses later denied making that identification.

According to the allegations made Friday, White admitted under defense questioning that the reports were incorrect. A judge, however, ruled that White was guilty only of conducting a sloppy investigation, not perjury. White could not be reached Friday for comment.

Conklin tried to get his evidence presented before sentencing, but he says in the claim that he was told by then prosecutor Cameron Talley “it would be preferable if you said your investigation was not completed.” Conklin’s findings were kept from the defense, the claim says.

Talley, now a private defense attorney, denied Conklin’s allegations, saying the investigator’s recollections are inaccurate. Talley said he pushed for full disclosure, urging that the allegedly forged reports be given to the defense team. However, Talley said he was concerned that Conklin was becoming biased in favor of the defense.

“My only direction (to Conklin) was to conduct a thorough, independent investigation,” he said. “You’re not a shill for the defense attorney.”

In a third case, noted in both of the claims made Friday, Conklin investigated former Laguna Beach resident Daniel Gidanian, who in 2008 was accused of slashing his girlfriend’s tires and stalking a Superior Court judge. During that investigation, Gidanian was overheard asking his mother to buy a gun and some ammunition during a phone call from jail that was tape recorded. Conklin later became convinced that the request was part of a plan for a potential “Sandy Hook” level mass shooting at an elementary school.

But, according to the claims, Conklin and his investigative partner in the case, Santos, were not allowed to continue investigating. Instead, they say, the case was handed over to other investigators, a move they said Friday was based on office politics.

Gidanian pleaded guilty in March to felony stalking and remains jailed pending new charges, including attempting to possess a gun as a felon.

The county claims, filed by attorney Joel Baruch, are considered precursors to a lawsuit.

“These guys are in the trenches. They know where the bodies are buried,” Baruch said of Conklin and Santos. “They came forward because they realized the District Attorney was not doing the right thing.”

The allegations against county prosecutors come against a backdrop of court rulings and other allegations that county prosecutors sometimes cheat to win cases, misusing jailhouse informants and routinely withholding evidence from defense lawyers. The U.S. Dept. of Justice, the California Attorney General and the Orange County Grand Jury are all independently investigating those claims, and an appeals court has described the cheating as “systemic.”

A special committee of outside legal consultants brought together by Rackauckas said last year that the office has a “win at all costs” mentality.