Door & Window

This photograph shows the exact layout at the rear of the house where all this took place. Note that there is a drop outside the rear door of the house which makes the kitchen higher inside than the level outside. Matthew was 6'. 1". Taller than Paul and would have been a lot taller that Paul again when he was inside and Paul was outside.

Forget the crisscrossed lead work in the glass. This was not in the glass that Matthew & Paul were fighting through, it was plain glass.
Given the height difference the chances of throwing broken glass through that window and making it stick in Matthew's neck are very slim indeed.

To begin with, Matthew would have had to bent forward sufficiently for Matthew to have received a fatal blow from a thrown piece of broken glass. I would say that this did not happen. The jury at the Crown Court certainly did not believe that Matthew died this way. However, Paul, not having even considered that Matthew may have impaled himself, and knowing full well that he had not "stabbed" him with a shard of glass, thought that this was the only possible explanation for Matthews death. A sheer accident through throwing glass into the kitchen from outside.