Eric Garner’s mother and sister filed suit Tuesday to force a “judicial inquiry” into claims that Mayor Bill de Blasio and other officials violated and neglected their duties to fully investigate Garner’s fatal 2014 arrest.

The Manhattan Supreme Court filing cites an obscure section of the City Charter that permits a judge to force city officials to testify under penalty of perjury when five “citizen-taxpayers” raise allegations of official misconduct.

Other plaintiffs include the mother of Ramarley Graham, who was fatally shot by an NYPD cop in 2012, and the leaders of several activist groups.

“Our hope is to hold everyone who was involved in my son’s murder accountable,” said Garner’s mom, Gwen Carr.

The suit claims that “there has been scant information released by the City about Mr. Garner’s death,” which followed a caught-on-camera struggle with cops during which he repeatedly gasped “I can’t breathe!”

The incident led Police Commissioner James O’Neill to fire Officer Daniel Pantaleo last week on grounds that he used a prohibited chokehold while arresting Garner on Staten Island on July 17, 2014.

A grand jury declined to indict Pantaleo on criminal charges in December 2014, and the US Justice Department opted against a civil-rights prosecution in July.

The suit says that Pantaleo’s departmental trial raised questions about “false statements by police officers” that “collectively suggest a concerted effort to cover up and minimize” the actions of other cops who piled on Garner during his arrest on suspicion of selling loose cigarettes.

Court papers also allege that the NYPD illegally leaked details of Garner’s rap sheet — which lists more than 30 arrests — and medical information, including his weight of more than 300 pounds and a history of asthma, sleep apnea and diabetes.

The suit was filed by lawyers including Alvin Bragg, a former Manhattan federal prosecutor and state chief deputy attorney general who is running for Manhattan district attorney in 2021.

Bragg said he wanted to help “provide the city with a transparent, thorough, independent investigation, something the city has wholly failed to do.”

A spokeswoman for de Blasio — who promised during a Democratic presidential primary debate last month that Garner’s family would “get justice” — defended the official response to his death.

“The police department conducted a fair and impartial investigation into this matter, including holding a public trial. For the first time, officers were held accountable,” spokeswoman Freddi Goldstein said.