In a slow, halting and sometimes emotional voice, Gregory Hicks, the deputy chief of mission who was in Tripoli, described for a House committee how a routine day on Sept. 11, 2012, quickly devolved as insurgents launched two nighttime attacks on the facility in eastern Libya, killing Stevens and three other Americans.
The hours-long hearing produced no major revelation while reviving disputes over the widely debunked comments made by U.N. Ambassador Susan Rice five days after the attacks and the inability of the U.S. military to respond quickly.
"I don't think there's a smoking gun today. I don't think there's a lukewarm slingshot," said Rep. Mark Pocan, D-Wis.
The session exposed bitter partisan divisions as Republicans who are pressing ahead with the investigation eight months after the attacks insist the Obama administration is covering up information and Democrats decry politicization of a national security issue.
Republicans have faulted former Secretary of State Hillary Rodham Clinton, a potential 2016 presidential candidate who came under tough criticism near the hearing's close.
Rep. Jason Chaffetz, R-Utah, choked up as he lamented the four deaths in Benghazi and accused Clinton of ducking blame for inadequate security. Chaffetz said he was astonished that "Clinton still has the gall to say 'it wasn't me, it was them.'"
A scathing independent review in December faulted the State Department for inadequate security at the mission, but it has not been the final word. Nor has congressional testimony from former Obama Cabinet officials and military leaders.
In a jam-packed hearing room where Republicans and Democrats furiously traded charges, the soft-spoken Hicks presented a lengthy recollection of the events and expressed frustration with a military that he argued could have prevented the second attack.
Hicks and two other State Department witnesses criticized the review conducted by former top diplomat Thomas Pickering and retired Adm. Mike Mullen, the former chairman of the Joint Chiefs of Staff. Their complaints centred on a report they consider incomplete, with individuals who weren't interviewed and a focus on the assistant secretary level and lower.
Hicks also told the committee that he was, in effect, demoted when he was moved from the position of deputy chief of mission to desk officer. Asked when he began to sense he was being viewed differently by his superiors, Hicks said he thought the criticism began after he had asked why Rice had referred to demonstrations in her televised remarks when he and others had reported that there had been an attack.
Hicks said he was watching television at his villa in Tripoli when he first got word of the initial attack. He listened to two messages on his cellphone and Stevens' chilling words.
"Greg, we're under attack," the ambassador said.
Hicks described a series of phone calls to the State Department and Libyan officials, frustrating efforts to find out what was happening in Benghazi, and a call from Clinton.
"Secretary of State Clinton called me along with her senior staff ... and she asked me what was going on. And, I briefed her on developments," he said. "Most of the conversation was about the search for Ambassador Stevens. It was also about what we were going to do with our personnel in Benghazi, and I told her that we would need to evacuate, and that was — she said that was the right thing to do."
He recalled another phone call from the Libyan prime minister with word that Stevens was dead.
"I think it is the saddest phone call I have ever had in my life," Hicks said.
Hicks said that shortly after he was told Stevens was dead, unidentified Libyans called Hicks' staff from the phone that had been with the ambassador that night. These Libyans said Stevens was with them, and U.S. officials should come fetch him, Hicks said. Hicks said he believed Stevens' body was at a hospital at that point, but he could not be certain.
"We suspected we were being baited into a trap," Hicks told the committee, so the U.S. personnel did not follow the callers' instructions. "We did not want to send our people into an ambush," he testified.
Republicans at the hearing focused on the talking points used by Rice on the Sunday talk shows in which she said the attacks appeared to be associated with demonstrations in Egypt and Libya over an anti-Islam video.
Rep. Trey Gowdy, R-S.C., said Rice's comments contradicted statements by Libyan leaders and others who called the attacks pre-meditated assaults by terrorists.
Gowdy said Rice's comments "perpetuated a demonstrably false narrative." Hicks, asked his reaction to the Rice's remarks on the talk shows, said: "I was stunned. My jaw dropped and I was embarrassed."
Democrats countered with a video clip of Director of National Intelligence James Clapper telling a Senate panel earlier this year that the hit on Rice was unfair.
"She was going on what we were giving her," Clapper said of the talking points.
Hicks insisted that the second attack in Benghazi could have been prevented if the U.S. military had scrambled jet fighters or sent in a C-130 cargo plane to scare off the insurgents with a show of force. He said he learned in conversations with veteran Libyan revolutionaries that they understood decisive air power after the U.S.-led NATO operation that helped oust Moammar Gadhafi.
"The defence attache said to me that fighter aircraft in Aviano might be able to" get to Benghazi in two to three hours, Hicks said.
Democrats pointed out that this contradicted the testimony of former Defence Secretary Leon Panetta and Gen. Martin Dempsey, the chairman of the Joint Chiefs of Staff, who testified before a Senate panel on Feb. 7.
"The bottom line is this: That we were not dealing with a prolonged or continuous assault which could have been brought to an end by a U.S. military response," Panetta testified. "Very simply, although we had forces deployed to the region, time, distance, the lack of an adequate warning, events that moved very quickly on the ground prevented a more immediate response."
After the first attack, a security team left Tripoli for Benghazi with two military personnel. Hicks said four members of a special forces team in Tripoli wanted to go in a second wave but were told to stand down.
Pentagon press secretary George Little said Wednesday that the commander told the team leader to stay in Tripoli because the evacuation of U.S. personnel out of Benghazi was already beginning and the team would not arrive in Benghazi in time to provide any assistance.
Col. David Lapan, spokesman for the Joint Chiefs of Staff, said that by the time the team would have left Tripoli, the second attack in Benghazi was over.
Republicans on five House committees, in an interim report released last month, also said that "no U.S. government element refused or denied requests for emergency assistance during the crisis."
Rep. Darrell Issa, R-Calif., chairman of the Oversight and Government Reform Committee, insisted that the investigation is necessary despite Democratic and administration complaints.
"These witnesses deserve to be heard on the Benghazi attacks, the flaws in the accountability review board's methodology, process and conclusion," he said at the start of the hearing.
Rep. Elijah Cummings of Maryland, the panel's top Democrat, challenged the select disclosure of information and comments from Republicans in the days leading up to the hearing.
"I am not questioning the motives of our witnesses. I am questioning the motives of those who want to use their statements for political purposes," Cummings said.
Also testifying at the hearing were Mark Thompson, acting deputy assistant secretary for counterterrorism, and Eric Nordstrom, a former regional security officer in Libya who testified before the panel in October.
Associated Press writers Charles Babington and Lolita C. Baldor contributed to this report.
Follow Donna Cassata at http://twitter.com/DonnaCassataAPSuggest a correction