@Yozzer This is a really good insight. Firstly that the person had been spoken to "A number of times" and over a relatively short period of the investigation (1 Year). But Peters face is a real giveaway. Firstly-It seems to come as news to him.
Secondly, there is a sense that he is sickened by the revelation and not because she had a new boyfriend.
Was his expression telling is the same as I am feeling-That this was a lie. That the person interviewed had 12 months and many face to face opportunities to reveal this but chose the moment, most probably when his own back was against the wall and as all small minds and sick people do-introduce a red herring?
Now in another article, the police mention this person who reveals the information as a work colleague. But were they a "direct" colleague who worked in the restaurant or perhaps a colleague from the wider university community who took meals in the cafe?
This for me and I know many others signifies that the "New Boyfriend" is a made up character. A patsy.
We saw this earlier in this case when and I say possibly, the same informant may well have tried to put Richard Cartwright in the frame as Alley man. When the guy was dead and couldn't speak for himself.
clearly someone who will go to any lengths to throw someone else under a bus.