What are you referring to? The police can only hold her for so long anyway without going to court to app for more time.The only way they’d have kept her after a police interview in a case as big as this is if she admitted it. The release after her interview means absolutely nothing in regards to whether her interview “harmed” her or not.
Until anyone is charged they are released. How do we know she was kept hold of after an interview had finished with her?