[The latest: The estranged husband of Ms. Dulos has been charged with murder.]

Last Friday, as she had many times before, Jennifer Dulos dropped her five children off at school.

She left her house in New Canaan, Conn., where she and her family had moved during a turbulent divorce battle with her husband, and drove less than a mile to a private school, the police said.

She has not been seen since.

A week after Ms. Dulos was reported missing, the search for her intensified and expanded across Connecticut, with investigators still trying to determine whether Ms. Dulos, 50, was the victim of foul play.

At the same time, the custody battle between Ms. Dulos and her husband, Fotis Dulos, continued in court, with Mr. Dulos claiming in a filing this week that their five children were being kept under armed guard at their grandmother’s apartment in New York.