Mollie Fitzgerald, an actor who starred in the 2011 Marvel film Captain America: The First Avenger, has been arrested on suspicion of stabbing her mother to death.
The victim, Patricia Fitzgerald, was found dead at her home in Olathe, Kansas, on 20 December, according to authorities.
Olathe police said officers were called to the home after reports of an "armed disturbance". When they arrived, Patricia, who was 68, was suffering from a stab wound.
Her daughter, Mollie, was taken into custody and charged with second-degree murder.
Alongside her minor role as Stark Girl in Captain America, Fitzgerald worked as an assistant to its director Joe Johnston.
She also appeared in the 2018 film Trouble Is My Business and wrote and directed the 2014 thriller The Lawful Truth and the 2011 comedy Absurd Illusions.
Patricia's brother, Gary Hunziker, told AP that his sister had been in the process of moving back to Kansas City from the Houston area when she died. He said he did not know what led to her stabbing.
"It doesn't matter the circumstances - the loss of a sister is what it's all about," he said.