But Nevill was a shadow of his former self those past few months, so much so that Barbara Wilson inquired if he had cancer. There was no point just doing away with Nevill as with him only out of the way his estate would pass to June.
Steve,Neville had all the worries of the world on his shoulders at that time. His wife had been seeing her GP for a long time leading up to the tragedy.There was the worry of Sheila's failing health. The futures of the twins. The " secret " of the land sale which he hadn't told to his immediate family. The fight outside the pub where he'd received a bash from his relative ( we don't know why but it must have been an intense situation for that to have happened )
He didn't need a busy body like BW questioning him either. There must have been a thousand and one things going on in the man's mind which does tend to cloud and also sap any strength that you could ever muster.
It wouldn't have made any difference if Neville had been at full strength because when you have a gun pointed at you,there's little you can do,except sit tight and hope it's not used,but by then it had been, and was too late against someone who had obviously been in a frenzy.