STAMFORD, Conn. (CBSNewYork) – The mother of the three children killed in a Christmas morning fire has filed a notice of intent to sue the city of Stamford, WCBS 880 Connecticut Bureau Chief Fran Schneidau reported.

WCBS 880 Connecticut Bureau Chief Fran Schneidau On The Story

Madonna Badger also lost her parents in the 2011 blaze.

Reached in his office in Massachusetts, attorney Frank Corso, who represents Mrs. Badger, declined comment on the specifics of the lawsuit. He cited legal ethics in not talking about his cases.

Mrs. Badger will sue separately from her estranged husband Matthew.

He has claimed negligence by city officials in their inspections of the house on Shippan Point, which was undergoing renovations when the fire erupted.

Investigators determined the fire was started by improperly discarded fireplace embers. Authorities said that contractor Michael Borcina is believed to have placed the ashes in or outside an entryway near the trash.

CBS2 reported that his lawsuit also focuses on the city’s decision to demolish the burned out house the day after the fire, which he said destroyed crucial evidence.

Still on the back burner is an ongoing investigation by the Stamford state’s attorney. He is deciding whether any criminal charges will be brought in connection with the tragic fire.

Three sisters, 9-year-old Lily and 7-year-old twins Sarah and Grace Badger, and their grandparents, Lomer and Pauline Johnson, died in the fire.

Do you think the city should be held responsible for the fire? Sound off in the comments section below.