has learned that former fbi deputy director andrew mccabe, fired by attorney general sessions just two days before his retirement, had once actually launched a criminal investigation into sessions himself. mccabe a year ago investigating whether sessions intentionally misled congress about his interactions with russians when he was a top adviser to the trump campaign. the probe triggered in part by this moment in sessions' confirmation hearing. >> i have been called a surrogate at a time or two in that campaign, and i did not have communications with the russians. >> reporter: it turns out sessions actually met at least twice with the russian ambassador, prompting calls for a criminal investigation by congressional democrats. mccabe launched that investigation, but it was ultimately closed with no action. and just last week, sessions fired mccabe. critics say the attorney general acted under pressure from president trump. but sessions says the fbi's inspector general concluded mccabe himself was less than candid when answering questions about his interactions with the media during an investigation into the clinton foundation. a source close to sessions told us today he was unaware of