Bellevue police have asked the mother of two-year-old Sky Eliah Metalwala to come to the station and answer additional questions about her son's disappearance. The toddler was reported missing on Sunday, Nov. 6, 2011.

A stay-at-home mother, Biryukova, told police that she was driving her brother's car to the Overlake Hospital Medical Center in Bellevue Sunday morning because her son was ill. She said the car ran out of gas in the 2600 block of 112th Avenue Northeast. She left her sleeping son in the unlocked car and walked with her 4-year-old daughter to get help. Her son was gone when she returned to the car about an hour later. Investigators said on Wednesday that the car had enough fuel to make it to several gas stations or a hospital, and that her story sounded suspicious.

She had declined to take a lie-detector test. Police have called her behavior suspicious, but have not named Biryukova as a suspect.

The children's father, Solomon Metalwala, 36, has been interviewed by police. Also Solomon, while speaking to Nancy Grace of CNN, mentioned that the mother of the missing boy so often said she wanted to kill herself. In fact, their older daughter began repeating the phrase.

Metawala hasn't seen his children since Dec. 10, 2010. He's not allowed to contact her because of a court-imposed restriction. His attorney has said Biryukova made false allegations in the court system that led to investigations, and the father was kept away. His attorney said the allegations were not true.

Metawala took a lie-detector test this week, but the first result was inconclusive. I'm of course willing to take another one, Metawala told Grace.