The family of an unarmed woman who was fatally shot by a Minneapolis police officer last summer filed a federal lawsuit on Monday against the officer, his partner, top police officials and the city itself.

The suit on behalf of the family of the woman, Justine Maia Ruszczyk, seeks $50 million in damages. In the minutes before she was shot, Ms. Ruszczyk, a dual citizen of Australia and the United States who was living in Minneapolis, called 911 twice to report sounds that she believed were of a woman being attacked somewhere in her affluent neighborhood.

“She saw something, she said something — and she got killed for it,” Robert Bennett, a lawyer for her family, said in an interview on Monday. The lawsuit also accuses Mohamed Noor, the police officer who shot Ms. Ruszczyk, and his partner, Matthew Harrity, of failing to turn on the body cameras they were wearing when they should have — in effect, conspiring to prevent the public from ever seeing what happened, the suit said.

“We want the Minneapolis police culture to be reformed in such a way and to the extent necessary to stop such senseless acts from happening again and again,” John Ruszczyk, the woman’s father, who is a plaintiff in the suit, said in a written statement. “As the complaint shows, the police department’s problems are systemic.”