A short report using the footage taken at the scene, plus what the PSNI has released.
Link:https://www.bellingcat.com/news/uk-a...of-lyra-mckee/

I am not an expert on such issues, but is clear that the police were inside their armoured Land Rovers - which were being hit by petrol bombs and other missiles. Oddly IMHO standing some distance behind the two vehicles at the front is a large group of individuals, who appear to be mainly adults just watching. The shots fired, estimates vary, would not have hit any police officer, just those watching.