Speaking from Heathrow Airport, Dunn’s mother, Charlotte Charles, said that she was “very, very open” to meeting with Sacoolas. But, she added, “Sorry just doesn’t cut it.”
“It’s not really quite enough,” she said.
In her statement, Sacoolas said she had cooperated with authorities at the scene of the accident and later at her home.
The police superintendent in Northamptonshire told NBC News the department had sought to conduct additional interviews with Sacoolas but needed the U.S. Embassy to waive her diplomatic immunity.
The application for a waiver was declined and Sacoolas returned to the United States, said the superintendent, Sarah Johnson.
Boris Johnson has said diplomatic immunity wasn't appropriate for such an incident, while Sky News reported Sunday that the country’s Foreign and Commonwealth Office told Dunn’s family that immunity was no longer “relevant” because Sacoolas had returned to the United States.
Asked to confirm the report, a spokesperson for the department said in an email to NBC News: “I can’t officially confirm this but I’m not steering you away from what you have just suggested.”
Tim Stelloh is a reporter for NBC News, based in California.