You do not know whereabouts PC Myall was situated in the grounds as opposed to where the 'unidentified' male was seen walking away in the grounds of the house. You don't know where the only other officer known to have entered the grounds of the farmhouse by that stage (PS Bews') was situated in relation to PC Myall, or the 'unidentified' male. All we know is what Kim Sengupta published in 'that' news article. I am minded to believe that 'Neville' may have been in possession of a firearm, when he was seen leaving the grounds at 'that' time. If so, it would explain why PC Myall did not approach him, or try to speak to him...
Mike, the sequence of their names is of no relevance. Call them policemen A, B, and C or 1, 2, and 3. It amounts to the same thing. Of course you believe the unidentified person, you insist is Ralph Nevill, was "in possession of a firearm" It equipped him better for shooting the family which is your other claim. I wonder when it was that Jeremy changed his mind from blaming it on Sheila to blaming it on the police to blaming it on the unidentified person ect................to NOW, once again blaming Sheila.