Police investigators say a 40-year-old Fairfax County woman found strangled last Sunday in the back seat of a car in a long-term parking lot at Dulles International Airport may have been killed in her Annandale home more than a week earlier.

Fairfax County and FBI investigators, who had obtained a search warrant, spent more than two hours Tuesday night at the two-story wood and brick home at 8808 Aunt Lilly Lane where the woman, Susan Davoudlarian, lived with her husband, David, and three children. Authorities said yesterday the investigation is continuing.

In court records supporting the search warrant, police said they "believe evidence relating to the death of Susan Davoudlarian may be found in the home." During the search Tuesday night, police confiscated about 10 personal items from the house, including two pairs of contact lenses, according to records filed in Fairfax County Circuit Court.

Citing the contact lenses as well as medications found in the house by family members, the police report noted, "Had she left the house of her own free will, she normally would have taken them with her."

Police also removed samples of stained carpeting and bedding, but police sources said yesterday preliminary tests from the stains have been inconclusive. Police lifted the stains after medical reports revealed that the strangulation of the victim probably was harsh and sudden enough to have caused secretions of body fluids.

According to police records filed yesterday in circuit court, Davoudlarian was last seen by her husband about 2 a.m. June 4 in the family home. David Davoudlarian, a physician specializing in obstetrics and gynecology, reported his wife missing the next day.

Sunday afternoon, eight days after that report was made, Susan Davoudlarian's nude body, covered with a blue and white blanket that police said matched a set of quilts in the house, was found on the rear floor of her station wagon in the airport parking lot.

Residents of the tree-shaded cul-de-sac in the Truro section of Annandale where the Davoudlarians lived said yesterday they are baffled by the bizarre crime.

"We called her the All-American mother," said Lisa DePriest, 18, whose family has lived next door for four years. "She was always hospitable. She'd always be the one to buy your Girl Scout cookies when everyone else had slammed the door in your face. She was 40, but she acted like she was 20."

Davoudlarian was described by neighbors as an attractive, outgoing woman who was especially popular among neighborhood children. She was voted "best mom" on the block at the past three Labor Day neighborhood picnics.

Neighbors said Davoudlarian spoke with a Southern drawl, spent much time on the local tennis courts and had done volunteer work at a small McLean art gallery for the past 10 years. Co-workers said she frequently purchased pieces of art on display at the gallery.

"Recently she said she had to quit buying because she had no more room on her walls," said one co-worker.

Davoudlarian's husband, who neighbors said is in his mid-50s, practices medicine in Fairfax and is a native of Syria.

Susan Davoudlarian was the mother of David Davoudlarian, 10, and of two children from a previous marriage, Susan Rooney, 18, and Lisa Rooney, 17, according to neighbors.

The 1982 white Plymouth station wagon in which Davoudlarian's body was found Sunday had been a surprise birthday gift from her husband last year, neighbors said.

"She always made the best of life," said one neighbor. "She lived life with a good, happy view, even if anything went wrong."