It comes too late for the man who gave the order to fire.
Maj. John D. Barry died at age 27 -- just two years after the end of the war.
"His family believed his death was a result of the depression and guilt he suffered as a consequence of having given the order to fire," the Virginia Military Institute site says.
Stonewall Jackson may have appreciated the Texas State researchers' hypothesis, not only because it would have alleviated the conscience of the men who took his life.
Before joining the Confederate Army, he was a science professor.