It would have been difficult with one hand severely injured, but former Naval Academy midshipman Diane Zamora could have acted alone and killed a girl she considered a romantic rival, her doctor testified.

Called as a prosecution witness in the capital murder trial of David Graham, Zamora's ex-fiance, Dr. Scott Kasden testified that the injury from a truck wreck would have hindered Zamora. The fingers in her left hand were crushed three months before the attack.But on questioning from the defense, Kasden conceded that a lone attack was possible - especially if she had a gun.

Defense attorneys for Graham, a former Air Force Academy cadet, contend Zamora alone fatally shot 16-year-old Adrianne Jones on Dec. 4, 1995.