The direct statement by Berkshire Transport police is even more clear! Let’s break it down by adding MargaritaPie and Discovereads interpretations of it. Original statement in italics, the only way they could be reading it in bold:
Do you recognise this person? [the purple wigged male person in the photo below]
Officers investigating an incident in which a person [but not necessarily the purple wigged male person in the photo below] exposed their genitals to two teenagers at Theale station are releasing CCTV images in connection.
At just before 3pm on 2 September, two teenage girls, aged 15 and 16, were sat on-board a train at the station when someone [who?] on the platform approached the train’s window.
As the train started the depart the station the person [but not necessarily the purple wigged male person in the photo below] exposed their genitals to the two teenagers before making lewd hand gestures in their direction.
They [could be anyone, not necessarily the purple wigged male person in the photo below] then walked into a shelter at the station and masturbated.
Officers believe the person in the CCTV images may have information which could help their investigation [and we aren’t saying the person in the images is the person who exposed themselves, and we aren’t NOT saying that either, they could be a suspect, a witness, or just a person].
Like I said, only a select group of special people could add that to interpret that statement in that way.