A link was given several threads ago, afaik. If I remember well, it was an interview with Anna/video.
I think, I wouldn't be successful with searching for it.
A "creepy" unknown man , no description, was sitting in a car and then speaking to Abby's mum, asking "Do you know me?" No idea, what Anna answered, but certainly she answered "No." He spoke further to her like a warning: she would have to think of, if she would recognize someone, she could make a mistake and it would be someone other possibly. Things weren't always as they appear. - All my wording.
When I still had my own personal poi for the crime, who I wouldn't name "for reasons", the person would have fitted well with this creepy approach.
Are you a bit satisfied with my answer? I hope so.