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.
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."
'Captain America' actress Mollie Fitzgerald has been charged with killing her mother in Kansas