Air Force officials said in a news conference Wednesday that there were human remains retrieved from the crash site. They would not elaborate, but said determining whether Gilbert is dead depends largely on those remains, which were undergoing DNA identification.
At the time of the crash, Gilbert was supporting troops fighting in Anbar province, the area of Iraq where many of the country's Sunni- Arab insurgent groups operate.
Videotape pictures obtained by Associated Press Television News appear to show the wreckage of the F-16CG jet in the farm field where it crashed and the nearby remains of a U.S. serviceman with a tangled parachute.
U.S. forces investigating the crash have said insurgents reached the site before American forces could.
The cause of the crash is under investigation. Officials don't believe it was shot down.
Officials switched between referring to Gilbert in the present and past tense during a Wednesday news conference at Luke Air Force Base in the western Phoenix suburb of Glendale, Ariz., where Gilbert has been stationed since 2003.
"Everybody liked himsuch a hard worker. Everyone here will tell you that. He did what it took to get the mission done," said Lt. Col. John Paradis, an Air Force spokesman. "He's someone that we remember very fondly."
Paradis explained his and another official's careful wording when referring to Gilbert's status.
"In situations like this, the Air Force and the Department of Defense want to be extremely careful about drawing any conclusions until we can look at all the facts that we have and everything available to us to make sure the family can have some closure, regardless of what that might be," Paradis said.
"Troy was first and foremost a wonderful husband and father," Gilbert's family said in a statement issued through the military. "His Christian faith, personal values, and work ethic guided his personal life and his career as a military officer.
"He was highly respected by and deeply loved by so many. At the time of the tragedy during combat operations, he was unselfishly protecting the lives of other American military members. We, his family, cherish the worldwide prayers and support during this extremely difficult time."
Gilbert was deployed to the 332nd Expeditionary Wing at Balad Air Force Base in Iraq in September and logged more than 130 combat hours, the Air Force said in a news release.
The release said Gilbert graduated with an economics degree from Texas Tech University in 1993 and graduated from officer training school in August 1994. His first assignment was at Lakenheath Air Base in England.
In January 2001, Gilbert finished undergraduate pilot training at Sheppard Air Force Base in Texas.
During his time at Luke Air Force Base, Gilbert was assistant director of operations, executive officer of wing flying, a flight commander and chief of training.
"Major Gilbert is well-known here at Luke Air Force Base," Brig. Gen. Tom Jones said. "He is an outstanding officer, an outstanding pilot, and an outstanding friend to many people here at Luke."