Luckylegs
So, if we’re allowed to discuss it now……. who pushed who off the roof then? Why was it left open with the wife having the phone in her bag? Why did the fat policeman have the stuff under his nails if there wasn’t any contact between him and the girl? Where did the scratches on the girl come from? Why was the policewoman told to lie? Anyone?
I agree with BigBertha that the wife knew her husband was having an affair, and has decided to keep the phone in case it comes in handy as a useful bargaining tool. (or maybe it's been left open for another series?)
Secondly, the policewoman, Lizzie, said she tried to grab the girl, and so did the fat policeman - hence the girl's skin under his nails and the scratches on her arm. I think Lizzie said that actually she felt that she pushed the girl off because if she hadn't tried to grab her, she and the fat policeman might not have fallen, but ............
While she, Lizzie, was in the cell, someone took her a cup of tea. We didn't see who it was, but the window flap was opened and she stood up and smiled.
Later it was said that the detective named Steve (with the beard) who had spoken to her earlier about lying to save her career, had been the person who took her a cup of tea and that he had "coached" her in what to say about the fat policeman trying to save the girl, not push her, thereby making the whole situation a terrible accident.