A former investigator with the special House committee probing the 2012 Benghazi attacks charged that the panel is carrying out "a partisan investigation" of Democratic presidential front-runner Hillary Clinton and not an independent factual inquiry of the assaults that killed four Americans in Libya.Air Force Reserve Maj. Bradley Podliska, an intelligence officer, plans to sue the panel — headed by Republican Rep. Trey Gowdy of South Carolina — accusing his supervisors of firing him in June after 10 months on the job for objecting to his efforts to conduct a nonpartisan inquiry, CNN reports. In an interview to be aired Sunday on the cable network's "State of the Union," Podliska said that the committee's focus changed after reports were published in March of Clinton's use of her private email account during her four years as secretary of state.Gowdy's panel subsequently subpoenaed all of Clinton's emails relating to Benghazi — and investigators have determined that many of the other emails reviewed from her private account contain classified information.Clinton is scheduled to testify before the Benghazi committee on Oct. 22.The former first lady's plunging poll ratings in recent weeks have been attributed to the email scandal — and House Majority Leader Kevin McCarthy's chances to become the chamber's top Republican were dashed after telling Fox News that the committee's work was directly tied to the plummeting figures."I knew that we needed to get to the truth to the victims' families," Podliska told Jake Tapper in the interview. "And the victims' families, they deserve the truth — whether or not Hillary Clinton was involved, whether or not other individuals were involved."The victims' families are not going to get the truth and that's the most unfortunate thing about this," he said.The 2012 attacks at the U.S. Consulate in Benghazi claimed the lives of Ambassador Christopher Stevens and three other Americans, including two former Navy SEALs.Podliska, who told Tapper that he was a "conservative Republican," also plans to allege in his lawsuit that he was fired because he took leave from the committee to fulfill his military service obligations, which would constitute unlawful termination.When Podliska returned from nearly two weeks of Air Force Reserve duty he said he learned that the Benghazi investigation "changed to focus on Secretary of State Hillary Clinton and the State Department, and deemphasize the other agencies that were involved in the Benghazi attacks and the aftermath of the attacks," according to a draft of the lawsuit provided to CNN by Podliska's lawyers.The inquiry had become an "agency-centric investigation," the lawsuit said."Hillary Clinton has a lot of explaining to do," Podliska told CNN. "We however did not need to shift resources to hyper focus on Hillary Clinton."We didn't need to deemphasize and in some cases drop the investigation on different agencies, different organizations and different individuals," he added. "There's wrongdoing here and I think it needs to stop."Podliska told CNN that he was fired for using work email to send a social invitation to colleagues, assigning an "unauthorized project" to an intern and allegedly putting classified information on an unclassified system.But a Benghazi committee spokesman denied Podliska's allegations surrounding his firing and regarding the panel's mission."We are confident that the facts and evidence give no support to the wild imagination fueling these and any future allegations, and the committee will vigorously defend itself against such allegations," the spokesman said in a statement. "The committee will not be blackmailed into a monetary settlement for a false allegation made by a properly terminated former employee."