Fairfax County police yesterday released a composite sketch of the last person seen with the family of Fuad K. Taima, the Iraqi businessman who was found shot to death along with his wife and son in their McLean home May 28.

Police said the man may have been driving a small white vehicle when he arrived at the Taimas' home on Broyhill Street.

Investigators theorize that the Taimas may have known the man because a witness saw him being allowed into the house about 10:30 p.m. on May 26, Officer Katie Hughes said yesterday.

Another witness heard gunshots about 10:45 p.m., Hughes said. The bodies were not found until two days later, when police were called to check on the Taimas. All three had been fatally shot in the upper body, police said.

Detectives have said there was no sign of forced entry into the Taima home and no sign of a struggle.

The man depicted in the sketch is not being termed a suspect by Fairfax County police, but only someone they want to question about the killings.

Fuad Taima was an international business consultant with ties to the Middle East and was a founder of the American Iraqi Foundation. Dorothy M. Taima, 54, taught English as a second language at American University's English Language Institute and other institutions. Their son, Leith F. Taima, 16, was a sophomore at McLean High School.

The man in the sketch is described as a short white man of average to heavy build, possibly of Middle Eastern descent, in his fifties, with black hair and brown eyes. Anyone with information about the man is asked to call the Fairfax County police at 703-691-2131.

CAPTION: This man is thought to have seen the Taimas shortly before they were shot.

CAPTION: Police are looking at business contacts of Fuad K. Taima. (1975 PHOTO)