An actress who appeared in "Captain America: The First Avenger" was arrested and charged with second-degree murder this week.

Mollie Fitzgerald is accused of killing her 68-year-old mother, Patricia Fitzgerald, in her home in Olathe, Kansas, on December 20.

The police charged and jailed Fitzgerald on a $500,000 bond on Tuesday.

The 38-year-old actress had a minor role as Stark Girl in the 2011 Marvel film. She was also an assistant to the director, Joe Johnston, on set.

The police have not released information about a motive as the investigation continues.

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Mollie Fitzgerald, who appeared in 2011's "Captain America: The First Avenger," was charged with second-degree murder in the death of her mother on December 20.

The 38-year-old actress and movie director was arrested on Tuesday after the police found her mother, Patricia Fitzgerald, dead inside her home in Olathe, Kansas. The 68-year-old had suffered from a stab wound.

Fitzgerald had a minor role as Stark Girl in the Captain America origin story and worked as an assistant to the director, Joe Johnston, on set.

Fitzgerald played Stark Girl in "Captain America: The First Avenger." Paramount Pictures

The actress, who has worked mostly on low-budget movies, including 2014's "The Lawful Truth" and 2017's "The Creeps," was charged and jailed on a $500,000 bond on Tuesday. It's unclear whether she had an attorney, CBS News reported. The police have not released information about a motive as the investigation continues.

Patricia Fitzgerald's brother Gary Hunziker told The Kansas City Star on Tuesday that the family knew few details about the circumstances surrounding his sister's death.

"We were shocked," he said, adding that "it doesn't matter the circumstances — the loss of a sister is what it's all about."