benghazi committee investigation comes forward. cnn s chris brace has latest. reporter: alison, a former staffer investigating the benghazi attacks says the probe has become a political probe targeting hillary clinton. it is a politically explosive charge sure to resonate on the campaign trail as clinton runs for president. an air force reserve intelligence officer says after news broke earlier this year that clinton used a private e-mail server, the republican control committee set its sites on clinton. he says he was fired as a investigator because he resisted to focus on clinton and he took military leave. he plans to fire a lawsuit over his firing and ask the court to give him his job back with back pay.