How did she know


How did that girl know Liam was a cop? and that the person they were looking for was going to be on the train at that time. And if they knew the person was going to be on the train then they had to know who it was.

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By “that girl” - you’re referring to Vera Farmiga? She knew Liam was an ex-cop because she was working with some powerful people. Patrick Wilson specifically picked Liam. They knew the witness would be on the train, but they didn’t know who the witness was

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